Python入門(初級編)
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1 Python ( ) 0.1 Noboru Yamamoto
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3 i 1 Python Programming Python Python (Script) Python Python Python python Python ( ) ( ) while, break, continue for Python
4 key items/values/keys has_key get() Format /map, apply, eval (map, filter) generator generator (filter exec, eval, execfile exec eval execfile apply reduce zip (module) Python EPICS CA monitor example RDB ii
5 4 Python Excel xlrd Example excel worksheet Python Indices and tables iii
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7 Date /converted Sphinx Version 0.1 / 0.1 Author Noboru Yamamoto Organization Accelerator Control Group, Accelerator Laboratory, KEK, JAPAN and Graduate University and 1
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9 3 1 Python Programming 1.1 Python Python Python (Script Python /usr/lib/python2.x/site-packages 1.2 Python (Script) Python text Python MyHelloWorld.py Python Python text *1 Emacs Python Eclipse Python Python Python IDLE *2 Python : *1 Windows MacOSX,Linux Text Edit/gedit *2 (NY) Emacs pyhton-mode.el Python Emacs Emacs IDLE Python Python Eclipse+PyDev (Java base) Python PyDev PyCharm Free (Community Edition) (Professional version) Editra Python Komodo ActiveState Python Komodo Active State Python Python Python( )
10 .. code-block:: python #!/usr/bin/env python #-- coding:utf-8 -- import sys,math r=float(sys.argv[1]) s=math.sin(r) print u.encode( utf-8 ) print Hello World!, sin(,r, ) =,s print u.encode( utf-8 ) MyHelloWorld.py *3 : IDLE PyCharm IDLE PyCharm + ( Python IPython, spyder ) -1.1 IDLE -1.2 PyCharm + *3 Python Scripting for Computational Science 4 1 Python Programming
11 1.3 Python MyHelloWorld.py python : % python MyHelloWorld.py 1.4 Hello World! sin( 1.4 ) = python Python MyHelloWorld.py ( 1.4 Pythoh program *4 : #!/usr/bin/env python #-*- coding:utf-8 -*- import sys,math r=float(sys.argv[1]) s=math.sin(r) print u" ".encode("utf-8") print "Hello World!","sin(",r,") = ",s print u" ".encode("utf-8") : %python MyHelloWorld.py 1 File "MyHelloWorld.py", line 7 s=math.sin(r) ^ IndentationError: unexpected indent : %python MyGoodbyWorld.py 1.4 /Library/Frameworks/Python.framework/Versions/2.7/Resources/Python.app/Contents/ MacOS/Python: can't open file 'MyGoodbyWorld.py': [Errno 2] No such file or directory ( No such file or directory ) OS (Windows/Linux/MacOSX) *
12 : %python MyHelloWorld.py Traceback (most recent call last): File "MyHelloWorld.py", line 6, in <module> r=float(sys.argv[1]) IndexError: list index out of range ( IndexError: list index out of range ) : Traceback (most recent call last): File "MyHelloWorld.py", line 7, in <module> s=math.sim(r) AttributeError: 'module' object has no attribute 'sim' sin sim * 5 : IDLE PyCharm Python *5 (debug) = ) 6 1 Python Programming
13 7 2 Python 2.1 Python Python * Python Python Linux MacOSX *7 python Python : %: python Python 2.5 (r25:51908, Mar , 14:03:40) [GCC 3.2.3] on linux2 Type "help", "copyright", "credits" or "license" for more information. python version >>> Python python >>> Python *8 python python >>> print " is ", is 579 >>> *6 *7 Windows Python Linux, MacOSX Python *8 Python Python / Python Python
14 2.1.3 Hello.pyPython * 9 %cat Hello.py #!python print "Hello, World." % python Hello.py Hello, World. % cat Unix python print Hello, World. Python Hello, World. python Hello, World. Python Python %: cat Hello.py #!/bin/env python # -*- coding: utf-8 -*- def main(): print "Hello World." if name == " main ": main() python python %: python Hello2.py Hello World. Python import (Python *** *** ) -*- coding:utf-8 -*- UTF-8 on-ascii *9 } 8 2 Python
15 def main() : main() main() Python if name == main : main() main Hello, World. 2.2 Python C * 10 Python : def add(x,y): z=x+y return z add(x, y) def add(x,y): z=x+y return z x,y add(x,y) def Python def C { } : double add(double x, double y){ double z; z=x+y; return z; } *
16 Python : : z=x+y return z emph{ } Python emacs(+python-mod.el), Python IDE(idle), eclipse(+pydev), PyCharm Python emacs+python-mode.el tab DEL IPython syntax IPytohn- Notebook jupyter Web Notebook Notebook Mathematica Notebook Graphical emacs jupyter Notebook IPython Kernel jupyter : ans=add(2,3) print "sum of 100 and 200 is ",add(100,200) add(400,500) Python 10 2 Python
17 def hello(): print "Hello! Welcome to the Python world." hello() def add1(x,y=1): return (x+y) y add1 print add1(2) print add1(2,3) print add1(x=4) print add1(y=5,x=6) add1 y=1 add1 x=2,y=3 x y >>> print add1(2) 3 >>> print add1(2,3) 5 >>> print add1(x=4) 5 >>> print add1(y=5,x=6) 11 def badd(x,y=1,z): # return (x+y+z) : >>> def badd(x,y=1,z):... return (x+y+z)
18 ... File "<stdin>", line 1 SyntaxError: non-default argument follows default argument (SyntaxError) Python 2.3 ** ** ** ** Python Python : >>> print add1(2) 3 >>> print add1(2,3) 5 >>> print add1(x=4) 5 >>> print add1(y=5,x=6) 11 print add1(2) 3 (print) print add1(2,3) 5 ( ) * 11 * Python
19 C main(){ printf("hello World\n"); } Python * 12 def main(): print "Hello World" if name == " main ": main() \ : def main(): print \ "Hello World" if name == " main ": main() () : x=(1+2+ 3) print x * Python C if(cond){ action_for_true(); return 1; } else{ action_for_false(); return 0; } *12 (, ( ) *13 Python
20 {} Python : if (cond): action_for_true() return 1 else: action_for_false() return 0 : ( Python >>> print "Hello World" Hello World >>> print "Hello World" File "<stdin>", line 1 print "Hello World" ^ IndentationError: unexpected indent >>> C Python C ) Python ** ** Python Python emacs python_mode.el Python IDE, eclipse python plugin Python : Python help() help 14 2 Python
21 Python ) Python a=3 while a>0: if a > 2: a=a/2 else: a=3*a+1 print a ( ) if < > statements if < >: statements C and or, not) C (&& ) * 14 if else if < >: <statements> else: <other statements> Python C Switch elif *14 / C Python and && Python C && and
22 if <cond1>: <statements1> elif <cond2>: <statements2> elif <cond3>: <statements3>... else: <staementsn> ( ) Python for while while, break, continue while while < >: < > <cond> < > while break < > continue while b >a: q=b/a r=b-q*a if r == 0: break b=a a=r <next statements after while> for Python for Python for for < > in < > : < > 1 10 for 16 2 Python
23 sum=0 for x in (1,2,3,4,5,6,7,8,9,10): sum=sum+x print sum (1,2,3,4,5,6,7,8,9,10) python tuple range() sum=0 for x in range(1,11): sum=sum+x print sum Python for else sum=0 for x in range(1,11): sum=sum+x else: print sum (print sum ) Python if,for,while Python Python idenfifier Python :: and del from not while as elif global or with assert else if pass yield break except import print class exec in raise continue finally is return def for lambda try ython tuple)
24 2.5.1 Python ) Python L j ( 1j j j L # 2+3j # long( ) # complex(2,3) # (\n Python C 1+2-3*4/5.**(6^7), +-*/ **( ) \%( << >> ( & ^ ( C //(floor division) sqrt, sine, cosine import math math.sin(math.pi/3) import import math math. Python Python Python Python (tuple) C Fortran 18 2 Python
25 Python list tuple sequence l=[3, 2, 7, 6, 5, 6, 3, 2, 6, 9] for i in range(10): print l[i], l[i]**2 l 10 [3, 2, 7, 6, 5, 6, 3, 2, 6, 9] l=[3, 2, 7, 6, 5, 6, 3, 2, 6, 9] for i in l: print i, i**2 range(10) 0 10 (sequence) : for i in range(10): i for tuple t=(3, 2, 7, 6, 5, 6, 3, 2, 6, 9) for i in t: print i, i**2 list [] tuple () list tuple (list) (tuple) Python List mutable( ), tuple immutable( ) sequence l=[3, 2, 7, 6, 5, 6, 3, 2, 6, 9] for i in range(10): if ( l[i]%2 == 0): l[i]=(l[i],l[i]**2) print l l [3, 2, 7, 6, 5, 6, 3, 2, 6, 9] [3, (2, 4), 7, (6, 36), 5, (6, 36), 3, (2, 4), (6, 36), 9] tuple
26 t=(3, 2, 7, 6, 5, 6, 3, 2, 6, 9) for i in range(10): if ( t[i]%2 == 0): t[i]=(t[i],t[i]**2) print t ( ): TypeError: 'tuple' object does not support item assignment (immutable) list() tuple() Python sequence ) Python l=[1,2,3] print l[0],l[1],l[2] i -i l=[1,2,3] print l[-3],l[-2],l[-1] len() l=[1,2,3] print "Size of list l is ",len(l) l=range(10) s=l[0:3:1] 20 2 Python
27 l=range(10) s=l[0:3] l=range(10) s=l[:3] l=range(10) s=l[-3:] s l [7,8,9] 2.6 Python mutable( 2.6.1, append l=[1,2,3] l.append(5) print l extend l=[1,2,3] l.extend([2,3]) print l l.append([4,5]) print l
28 extend append Python (Tuple insert l=[1,2,3] l.insert(1,10) print l l.insert(0,20) print l l.insert(-1,30) print l insert remove remove insert l=[1,2,3,4,5] l.remove(3) print l del l=[1,2,3,4,5] del l[2] sort reverse sort reverse l=[1,5,3,2,4] l.sort() print l l.reverse() print l sort,reverse 22 2 Python
29 sorted() %reversed() type %reversed() iterator l=[1, 5, 3, 2, 4] print sorted(l) # print l # for e in reversed(l):# print e l.sort() # print l # l.reverse() # print l l.sort(reverse=true) # print l for e in reversed(l): print e 2.7 Pascal = Python sequence(list, tuple, string) class object class import Python C ( ) ( ) s="abc" t='abc' Python Unicode unicode u=u"abc" u Python
30 s="abcdefghijklmn" print s[::2] for c in s: print c print list(s) print tuple(s) insert, remove print dir("") help(type("")) type() dir() print "abc"+"123" C printf, sprintf Python % import math th=math.pi/3 s=math.sin(th) print "sin(%f) = %f"%(th,s) sin( ) = C %d,%f,%g,%s % 24 2 Python
31 2.8 (dictionary) Python d={"a":1} a 1 d d={"a":1,"b:2,"c":3} dict() d=dict(a=1,b=2,c=3) key (key, value) (value) Python key data key Python immutable key immutable mutable key key d=dict(a=1,b=2,c=3) print d["a"] key [] key d={"a":1,"b":2,"c":3} k="a" print d[k]
32 2.8.3 Python items/values/keys Key (value) items Key tuple >>> d=dict(a=1,b=2,c=3) >>> d.items() [('a', 1), ('c', 3), ('b', 2)] >>> e=dict(x=0,y=-1,z=1) >>> e.update(d.items()) >>> e {'a': 1, 'c': 3, 'b': 2, 'y': -1, 'x': 0, 'z': 1} Key keys values >>> e.keys() ['a', 'c', 'b', 'y', 'x', 'z'] >>> e.values() [1, 3, 2, -1, 0, 1] has_key has_key() key True False *15 d={} for word in line: if d.has_key(word): d[word] +=1 else: d[word]=1 *15 True False Python None True False,True False 26 2 Python
33 for k in d: print k, d[k] line get() for key in mylist: print "value for %s is "%key, d.get(key,"n/a") d get key d d[k] key d None items/keys/valuse,iteritems/iterkeys/itervalues for-loop for k, v in dictionary.iteritems(): print k,v Format C sprintf % x=1 y=2 print "%f + %f makes %f"%(x,y,x+y) % (%f % key x=1;y=2 "%(a)f plus %(b)f makes %(ans)f\n"%dict(ans=x+y,a=x,b=y) >>> ' plus makes \n'
34 Python global local global local, globals() locals(), globals() locals() global local >>> globals() {' builtins ': <module ' builtin ' (built-in)>, ' name ': ' main ', 'y': 2, ' doc ': None, 'x': 1} >>> locals() {' builtins ': <module ' builtin ' (built-in)>, ' name ': ' main ', 'y': 2, ' doc ': None, 'x': 1} eval() Python (expression) global local Python (identifier). C Python C ( 2.9 /map, apply, eval Python map, apply, lambda, filter, eval,execfile Lisp Python Guido Lisp Python2.x, Lisp eval execfile (map, filter) Python ((list comprehension) 0 2N [2*i for i in range(n)] 28 2 Python
35 [i for i in range(2*n) if (i%2 ==0)] quad=map(lambda x:x**4,range(100)) quad=[x**4 for x in range(100)] generator generator generator in generator sum=0 for x in ( 2*i for i in range(100)): sum=sum+x ( [ ] ) generatro ( ( ) ) generator Tuple generator generator generator iterable next() for List iterrable generator generator generator iterrator next() iteration generator generator (return ) yield generator generator (filter generator if even=[i for i in range(100) if i % 2 == 0] for e in ([i for i in range(100) if i % 2 == 0):e... do something for e /map, apply, eval 29
36 filter even=filter( lambda x: x%2 == 0, range(100)) generator filter() lambda * exec, eval, execfile exec exec python exec "exec" expression ["in" expression ["," expression]] expression exec Python in dictionary gobal local exec "print `Hello`" eval Lisp apply,eval map Python eval Python compile() eval eval(...) eval(source[, globals[, locals]]) -> value eval exec import sys eval("sys.stdout.write('hello\\n')") execfile execfile eval file filename Python exec globals locals *16 True False Python None True False,True False 30 2 Python
37 execfile(filename[, globals[, locals]]) import execfile exec apply apply callable, call tuple, kwargs apply(...) apply(object[, args[, kwargs]]) -> value kwargs( args object Python 2.3 apply obsolete object(*args,**kwargs) (Lisp, apply reduce reduce() func (Tuple, list reduce(...) reduce(function, sequence[, initial]) -> value function reduce initial function(initial, sequence[0]) initial function(sequence[0],sequence[1]) function sequence function reduce(lambda x,y:x+y,(1,2,3,4,5)) reduce ((((1+2)+3)+4)+5) reduce(lambda x,y:(x,y), (1,2,3,4,5)) ((((1, 2), 3), 4), 5) 2.9. /map, apply, eval 31
38 zip Mathematica/SAD script Thread zip sequence tuple i- zip sequence i tuple zip(...) zip(seq1 [, seq2 [...]]) -> [(seq1[0], seq2[0]...), (...)] print zip((1,2,3),(2,4,6),(5,15,20)) [(1, 2, 5), (2, 4, 15), (3, 6, 20)] zip None map print map(none, [1,2,3],[2,4,6],[5,15,20]) [(1, 2, 5), (2, 4, 15), (3, 6, 20)] sequence >>print map(none, [1,2,3]) [1, 2, 3] >>print zip( [1,2,3]) [(1,), (2,), (3,)] map zip >>> def func(i,c):... return dict( ((c,i),) )... >>> print map(func,(0,1,2),("a","b","c")) [{'a': 0}, {'b': 1}, {'c': 2}] >>> print [func(i,c) for i,c in zip((0,1,2),("a","b","c"))] [{'a': 0}, {'b': 1}, {'c': 2}] zip enumeratet type l e=enumberate(l) enumerate e method next (0,l[0]), (1,l[1]), (2,l[2]),... l[i] StopIteration for p in enumerate(l): print "%d-th elment of l is %s"%p 32 2 Python
39 2.10 (module) Python Python Python Python ** :module** Python ( ) Python Python os os.uname() : import os print os.uname() import os os Python ( print os uname() : % python python Python (v2.7.6:3a1db0d2747e, Nov , 00:42:54) [GCC (Apple Inc. build 5666) (dot 3)] on darwin Type "help", "copyright", "credits" or "license" for more information. >>> import os import os >>> print os.uname() print os.uname() ('Darwin', 'MacBook-Pro.local', '13.0.0', 'Darwin Kernel Version : Thu Sep 19 22:22:27 PDT 2013; root:xnu ~6/release_x86_64', 'x86_64') >>> import ( (os.uname ) from import ``\ \ ``import as : import os print os.uname() from os import uname print uname() from os import os.uname as un print un() (module) 33
40 : >>> from os import uname as un >>> print un() ('Darwin', 'MacBook-Pro.local', '13.0.0', 'Darwin Kernel Version : Thu Sep 19 22:22:27 PDT 2013; root:xnu ~6/release_x86_64', 'x86_64') from import from import * * 34 2 Python
41 35 3 Python python : Python Python URL 25 EOL(End of Line) DOS (0x0d0x0a \r\n ) #Record of Sealevel(mm) #Location No 11 #Location Katsuura #TimeZone +09:00(JST) #Broken or No transmit data "-999" #Datum constant 5000 mm #Height of the fixed point 2002 mm #date time mm 2008/07/08 04:00: /07/08 04:00:
42 3.1.2 Python fn="11_ _sec30_n.txt" f=file(fn,"ru") #f=open(fn,"ru") print f.next() #. \ ``fn``\ #. (`r`) \ `U`\ "Universal newline support" #. >>> fn="11_ _sec30_n.txt" >>> f=file(fn,"ru") >>> print f.next() #Record of Sealevel(mm) open r U ( \r, \r\n, \n ) while 1: l=f.next() if not(l[0] == "#"): break l >>> print l 2008/07/08 04:00: date, t, d=l.split() date, t, d split() >>> print date 2008/07/08 >>> print t 04:00:00 >>> print d 36 3 Python
43 2959 >>> type(d) <type 'str'> >>> d=int(d) >>> print type(d),d <type 'int'> 2959 d split int python datetime : import datetime dt=datetime.datetime(1,1,1) datetime dt date t dir(dt) [' add ', ' class ', ' delattr ', ' doc ', ' eq ', ' ge ', ' getattribute ', ' gt ', ' hash ', ' init ', ' le ', ' lt ', ' ne ', ' new ', ' radd ', ' reduce ', ' reduce_ex ', ' repr ', ' rsub ', ' setattr ', ' str ', ' sub ', 'astimezone', 'combine', 'ctime', 'date', 'day ', 'dst', 'fromordinal', 'fromtimestamp', 'hour', 'isocalendar', 'isoformat', 'isoweekday', 'max', 'microsecond', 'min', 'minute', 'month', 'now', 'replace', 'resolution', 'second', 'strftime', 'strptime', 'time', 'timetuple', 'timetz', 'today', 'toordinal', 'tzinfo', 'tzname', 'utcfromtimestamp', 'utcnow', 'utcoffset ', 'utctimetuple', 'weekday', 'year'] datetime help(dt) datetime (Unix )strptime : dt=datetime.datetime(1,1,1) # datetime dt=dt.strptime(" ".join((date,t)),"%y/%m/%d %H:%M:%S") # datetime print dt strptime Unix strftime man strftime
44 3.1.4 import datetime def data(l): date,t,d=l.strip() d=int(d) dt=datetime.datetime(1,1,1) dt=dt.strptime(" ".join((date,t)),"%y/%m/%d %H:%M:%S") return (dt,d) def header(l): h=l[1:].split() key=h[0] val=" ".join(h[1:]) return dict(((key,v),)) def readtide(fn): myhd=dict() mydata=[] f=file(fn,"ru") for l in f: if l[0]=="#": myhd.update(header(l)) else: mydata.append(data(l)) return (myhd,mydata) 3.2 Python dir() help() 38 3 Python
45 3.2.1, header, data, readtide import time def header(l): h=l[1:].split() key=h[0] val=" ".join(h[1:]) return dict(((key,val),)) def data(l): date,t,d=l.split() d=int(d) dt=time.strptime(" ".join((date,t)),"\%y/\%m/\%d \%H:\%M:\%S") return (dt,d) def readtide(fn): myhd=dict() mydata=[] f=file(fn,"ru") for l in f: if l[0]=="#": myhd.update(header(l)) else: mydata.append(data(l)) return (myhd,mydata) readtide header data header (file #TideData.py import time class TideData: def init (self, fn): self.fn=fn self.hd=dict() self.data=[] self.readfile() def ReadFile(self,fn=""): if fn: self.fn=fn f=file(self.fn,"ru") for l in f: if l[0]=="#": self.headerline(l)
46 else: self.dataline(l) def HeaderLine(self, l): h=l[1:].split() key=h[0] val=" ".join(h[1:]) self.hd[key]=val def DataLine(self, l): date,t,d=l.split() d=int(d) dt=time.strptime(" ".join((date,t)),"%y/%m/%d %H:%M:%S") self.data.append((dt,d)) init (file ReadFile ReadFile readtide return heder(), data() HeaderLine(), DataLine() Python import TideData,Gnuplot,time td=tidedata.tidedata("11_ _sec30.txt") gp=gnuplot.gnuplot() gp.plot([(time.mktime(x[0]),x[1]) for x in td.data]) Gnuplot gnuplot ) UTC import TideData,Gnuplot,time td0=tidedata.tidedata("11_ _sec30.txt") td1=tidedata.tidedata("11_ _sec30.txt") td2=tidedata.tidedata("11_ _sec30.txt") td3=tidedata.tidedata("11_ _sec30.txt") gp=gnuplot.gnuplot() 40 3 Python
47 gp('set data style lines') gp.plot([(time.mktime(x[0]),x[1]) for x in (td0.data+td1.data+td2.data+td3.data)]) Python 3.3 EPICS CA monitor example Python EPICS CA Python EPICS CA Python ca ca KEK J-PARC ca #!/bin/env python """ Simple EPICS monitor callback example """ import ca class mych(ca.channel): def init (self,name): ca.channel. init (self,name) def cb(self,valstat): self.update_val(valstat) print self.name, valstat[:3],ca.ts2ascii(valstat[3]) def test(): ch=mych("fred") try: ch.wait_conn() try: ch.monitor(ch.cb) ca.pend_event(0) except: raise except: print "channel not connected" if name ==" main ": test() cas : #!/bin/env python """ Simple example for monitor callback using cas. """ 3.3. EPICS CA monitor example 41
48 import cas class myobj: def init (self,chname): self.name=chname self.ch=cas.caopen(chname) def cb(self,valstat): val,sevr,stat,ts=valstat print self.name,val,sevr,stat,cas.ca.ts2ascii(ts) def startmonitor(self): cas.camonitor(self.name,self.cb) def test(name="fred"): obj=myobj(name) obj.startmonitor() try: cas.ca.pend_event(0) finally: cas.caclear_monitor("fred",ch) if name == " main ": test("jane") 3.4 RDB relational databse Python RDB Python PostgreSQL psycopg2 PostgreSQL EPICS record 350BT KEKBAlarm PostgreSQL EPICS record JK350BTAlarm.py : #!/bin/env python # -*- encoding:utf-8 -*- # file:jk350btalarm.py import psycopg2 import cstringio class epics_records: _dbname="jk" _tablename="epics_records_test1" _desc_tablename= "epics_records_desc_test1" _user="readonly" _passwd="readonly" _host="jkjrdb01.ccr.jkcont" 42 3 Python
49 _con=none def init (self): if not self._con: self._con=psycopg2.connect(database=self._dbname, host=self._host, user=self._user, password=self._passwd) self.cursor=self._con.cursor() def select_fault_record(self): self.cursor.execute("select * from epics_records_test1 where name ~ '350BT. * STAT\:FAULT.*' and (type = 'bi' or type = 'calc')") def select_off_record(self): self.cursor.execute("select * from epics_records_test1 where name ~ '350BT. * STAT\:OFF.*' and (type = 'bi' or type = 'calc')") def select_interlock_record(self): self.cursor.execute("select * from epics_records_test1 where name ~ '350BT. * ILK\:.*' and (type = 'bi' or type = 'calc')") JK350BTAlarm.py KBKAlarm genkekbalarmconfig.py : #!/bin/env python #-*- encoding utf-8 -*- #file:genkekbalarmconfig.py import cstringio class KEKBAlarmConfigElement: def init (self, channel, message, connectmask=-1, alarmmask=-1, alarmxor=0, alarmvalue=none): self.channel=channel self.message=message self.connectmask=connectmask self.alarmmask=alarmmask self.alarmxor=alarmxor self.alarmvalue=alarmvalue def str (self): fmt0="{\"%s\",\"%s\",%s, %s, %s}" fmt1="{\"%s\",\"%s\",%s, %s, %s, %s}" if self.alarmvalue: return fmt1%(self.channel, self.message, self.connectmask, self.alarmmask, self.alarmxor, self.alarmvalue) else: return fmt0%(self.channel, 3.4. RDB 43
50 self.message, self.connectmask, self.alarmmask, self.alarmxor,) class KEKBAlarmConfigFile: def init (self, name="alarmconf"): self.name=name self.ch_f=open(name+"channels.sad","w") self.check_f=open(name+"check.sad","w") self.elements=[] def del (self): self.ch_f.close() self.check_f.close() def add(self,channel, message, connectmask=-1, alarmmask=-1, alarmxor=0, alarmvalue=none): self.elements.append(kekbalarmconfigelement( channel, message, connectmask, alarmmask, alarmxor, alarmvalue ) ) def str (self): fmt=""" SetEnv["EPICS_CA_ADDR_LIST",GetEnv["EPICS_CA_ADDR_LIST"]//" "]; %schannels={ %s}; """ strio=cstringio.stringio() for e in self.elements: strio.write(str(e)) strio.write(",\n") return fmt%(self.name,strio.getvalue()) def test(): cf=kekbalarmconfigfile("jkj350bt") import JK350BTAlarm db=jk350btalarm.epics_records() db.select_fault_record() for e in db.cursor: cf.add(e[0],e[3]) db.select_off_record() for e in db.cursor: cf.add(e[0],e[3]) db.select_interlock_record() for e in db.cursor: cf.add(e[0],e[3]) print cf cf.ch_f.write(str(cf)) 44 3 Python
51 if name == " main ": test() : Python import test() python test() 3.4. RDB 45
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53 47 4 Python Date , Version 0.1 / 0.1 Author Noboru Yamamoto Organization Accelerator Control Group, Accelerator Laboratory, KEK, JAPAN and Graduate University Python Contents: Excel Microsoft Excel Excel Excel xls xlsx xls xlsx xml Excel Python openpyxl xlsx xls Book/Worksheet xlrd, xlwt xls (xlrd) (xlwt). xlsx Excel pandas
54 pandas pandas excel pandas dataframe xlrd/xlwt xlrd Example from future import print_function from os.path import join, dirname, abspath import xlrd fname = join(dirname(dirname(abspath( file ))), 'test_data', 'Cad Data Mar xlsx') # Open the workbook xl_workbook = xlrd.open_workbook(fname) # List sheet names, and pull a sheet by name # sheet_names = xl_workbook.sheet_names() print('sheet Names', sheet_names) xl_sheet = xl_workbook.sheet_by_name(sheet_names[0]) # Or grab the first sheet by index # (sheets are zero-indexed) # xl_sheet = xl_workbook.sheet_by_index(0) print ('Sheet name: %s' % xl_sheet.name) # Pull the first row by index # (rows/columns are also zero-indexed) # row = xl_sheet.row(0) # 1st row # Print 1st row values and types # from xlrd.sheet import ctype_text print('(column #) type:value') for idx, cell_obj in enumerate(row): cell_type_str = ctype_text.get(cell_obj.ctype, 'unknown type') print('(%s) %s %s' % (idx, cell_type_str, cell_obj.value)) # Print all values, iterating through rows and columns # num_cols = xl_sheet.ncols # Number of columns for row_idx in range(0, xl_sheet.nrows): # Iterate through rows print ('-'*40) print ('Row: %s' % row_idx) # Print row number for col_idx in range(0, num_cols): # Iterate through columns 48 4 Python
55 cell_obj = xl_sheet.cell(row_idx, col_idx) # Get cell object by row, col print ('Column: [%s] cell_obj: [%s]' % (col_idx, cell_obj)) excel Excel Workbook xlrd xls,xlsx openpyxl xlsx xls xlrd xlrd wb=xlrd.open_workbook(u"./data/mrshift_run#72( )all.xls") openpyxl wb=openpyxl.reader.excel.load_workbook(u"./data/ MRshift_Run#72( )all.xlsx") worksheet workbook work worksheet xlrd sheet_names=wb.sheet_names() sheet=wb.sheet_by_index(0) sheet=wb.sheet_by_name(sheet_names[0]) openpyxl ws0=wbk.worksheets[0] xlrd 2 (0 openpyxl Excel A1 (row), (column) 1 xlrd th=ws0.nrows tw=ws0.ncols r=ws0.row(0) 4.2. Excel 49
56 c=ws0.col(0) v=ws0.cell(0,0).value # ws0.cell_value(0,0) openpyxl ws0=wbk.worksheets[0] th=ws0.max_row tw=ws0.max_column cell_a1=ws0["a1"] crange=ws0["a1:b2"] v=ws0.cell(row=1,column=1).value 4.3 Python Python ( Python 1. Python 2. python 3. Python 4. python 5. Python immutable( ) 6. Python 7. Python 8. Python (Python,Zen of Python) Python Python Python % python Python (v2.7.4:026ee0057e2d, Apr , 11:43:10) [GCC (Apple Inc. build 5666) (dot 3)] on darwin Type help, copyright, credits or license for more information. >>> import this The Zen of Python, by Tim Peters *Beautiful is better than ugly. *Explicit is better than implicit Python
57 *Simple is better than complex. -Complex is better than complicated. -Flat is better than nested. -Sparse is better than dense. -Readability counts. -Special cases aren t special enough to break the rules. -Although practicality beats purity. -Errors should never pass silently. -Unless explicitly silenced. -In the face of ambiguity, refuse the temptation to guess. -There should be one and preferably only one obvious way to do it. -Although that way may not be obvious at first unless you re Dutch. -Now is better than never. -Although never is often better than right now. -If the implementation is hard to explain, it s a bad idea. *If the implementation is easy to explain, it may be a good idea. *Namespaces are one honking great idea let s do more of those! >>> 4.4 Indices and tables genindex modindex search 4.4. Indices and tables 51
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