Python基础学习代码之文件和输入输出

import os
ls = os.linesep
def func1():
 filename = raw_input('enter file name:')
 f = open(filename,'w')
 while True:
 alline = raw_input("enter a line ('.' to quit):")
 if alline != '.':
 f.write("%s%s"%(alline,ls))
 else:
 break
 f.close()

def func2():
 f = open('e:\thefile.txt','w+')
 print f.tell()
 f.write('the line 1
')
 print f.tell()
 f.write('the line 2
')
 print f.tell()
 f.seek(-12,1)
 print f.readline()
 print f.tell()
 f.seek(0,0)
 print f.readline()
 print f.tell()
 f.close()

import sys
import os
def func3():
 print 'you are',len(sys.argv),'arguments'
 print 'there are',str(sys.argv)

def func4():
 for tmpdir in ('e:\','d:\'):
 if os.path.isdir(tmpdir):
 break
 else:
 print 'no directory available'
 tmpdir = ''
 if tmpdir:
 os.chdir(tmpdir)
 cwd = os.getcwd()
 print 'current directory',cwd
 print 'create example directory'
 #os.mkdir('example')
 #os.chdir('example')
 cwd = os.getcwd()
 print 'new directory',cwd
 print 'directory list'
 os.listdir(cwd)
 print 'create test file'
 f = open('test','w')
 f.write('test
')
 f.write('test
')
 f.close()
 print 'update directory list'
 print os.listdir(cwd)
 print 'rename test to filetest'
 #os.rename('test','filetest')
 print 'update directory list'
 print os.listdir(cwd)
 path = os.path.join(cwd,os.listdir(cwd)[0])
 print 'full file pathname'
 print path
 print 'pathname,basename'
 print os.path.split(path)
 print 'filename,extension'
 print os.path.basename(path)
 print os.path.splitext(os.path.basename(path))
 print 'display file contents'
 f = open('test','r')
 for eachline in f:
 print eachline
 f.close()
 print 'delete test file'
 os.remove(path)
 print 'update directory list'
 print os.listdir(cwd)
 os.chdir(os.pardir)
 print 'delete test directory'
 os.rmdir('example')
 print 'done'

def func5():
 print os.path.expanduser("~")

def func6():
 filename = raw_input('input file:')
 f = open(filename,'r')
 for eachline in f:
 if not eachline.strip().startswith('#'):
 print eachline

def func7():
 filename = raw_input('input file:')
 f = open(filename,'r')
 for eachline in f:
 if not '#' in eachline[1:]:
 print eachline
 f.close()
def func8():
 filename = raw_input('input file:')
 line = int(raw_input('input line number:'))
 f = open(filename,'r')
 for eachline in f:
 if line:
 print eachline
 line -= 1
 else:
 break

def func9():
 filename = raw_input('input file:')
 lines = open(filename,'r').readlines()
 return len(lines)

import os
def func10():
 ls = os.linesep
 with open('e:\tmp.txt','a+') as f:
 for i in range(100):
 f.write("%s%s"%(i,ls))
 with open('e:\tmp.txt','r') as f:
 num = 1
 for eachline in f:
 if num % 26 != 0:
 print eachline
 num += 1
 else:
 go = raw_input('continue,press c to quit')
 num += 1
 if go == 'c':
 break

def func11(file1,file2):
 alines = open(file1,'r')
 blines = open(file2,'r')
 row = 0
 for (aline,bline) in zip(alines,blines):
 row += 1
 if aline == bline:
 pass
 else:
 col = 0
 print row
 for (a,b) in zip(aline,bline):
 if a == b:
 col += 1
 else:
 print col
 alines.close()
 blines.close()

from ConfigParser import ConfigParser
def func12():
 cp = ConfigParser()
 #print os.path.join('C:\Windows\','win.ini')
 cp.read(os.path.join('C:\Windows\','win.ini'))
 for section in cp.sections():
 #print cp.items(section)
 for key in cp.options(section):
 print '[%s]-%s=%s'%(section,key,cp.get(section,key))

 cp.add_section('name')
 cp.set('name','test',25)
 f = open(os.path.join("e:\","test.txt"),'a')
 cp.write(f)
 f.close()

def func13():
 prompt = """
(S)avings
(C)heck
(F)inancialmarket
(D)eposit
(E)xit
enter your choice:"""
 function = """
(s)avings
(d)raw
(b)orrow
(l)oan
enter your choice:"""
 account = {'s':'Savings','c':'Check','f':'Financial','d':'Deposit'}
 fun = {'s':'savings','d':'draw','b':'borrow','l':'loan'}
 cf = ConfigParser()
 cf.read('e:\FamilyAccount.ini')
 enter = raw_input(prompt).strip().lower()[0]
 while True:
 if enter in 'scfd':
 print 'welcome %s bussness' % account[enter].lower()
 section = account[enter]
 select = raw_input(fun).strip()[0].lower()
 if select in 'sdbl':
 print 'welcome %s bussness' % fun[select]
 key = fun[select]
 mokey = int(raw_input('Enter amount of money<must be digit.>:'))
 cancel = raw_input('Cancel,please press "c"...
')
 if cancel == 'c':
 return False
 else:
 f = open('e:\FamilyAccount.ini','w')
 cf.write(f)
 f.close()
 elif enter == 'e':
 return False
 else:
 print 'Invalid operation,try again'

import sys
import os
def calc(argument):
 if argument[1] == '+':
 return int(argument[0]) + int(argument[1])
 elif argument[1] == '*':
 return int(argument[0]) * int(argument[1])
 elif argument[1] == '-':
 return int(argument[0]) - int(argument[1])
 elif argument[1] == '**':
 return int(argument[0]) ** int(argument[1])
 elif argument[1] == '/':
 return int(argument[0]) / int(argument[1])
#if __name__ == '__main__':
 if sys.argv[1:][0] == 'print':
 with open('e:\txt','r') as f:
 print f.read()
 os.remove('e:\txt')
 else:
 with open('e:\txt','w') as f:
 f.write("".join(sys.argv[1:]))
 f.write('
')
 f.write(str(calc(sys.argv[1:])))
 f.write('
')

def func14():
 afile = raw_input('input file:')
 bfile = raw_input('input file:')
 with open(afile,'r') as af:
 with open(bfile,'w') as bf:
 for eachline in afile:
 bf.write(eachline)
 with open(bfile) as bf:
 print bf.read()

import os
def func15():
 file = raw_input('enter file:')
 with open(file,'r') as af:
 with open('e:\test.txt','w') as bf:
 for eachline in af:
 if len(eachline) > 80:
 alist = list(eachline)
 count = len(alist) / 80
 for i in range(count):
 bf.write("".join(alist[:79]))
 bf.write('
')
 alist = alist[79:]
 bf.write("".join(alist))
 else:
 bf.write(eachline)
 bf.write('
')
 with open('e:\test.txt','r') as bf:
 with open(file,'w') as af:
 for eachline in bf:
 af.write(eachline)
 os.remove('e:\test.txt')

def createfile():
 file = raw_input('input filename:')
 content = raw_input('input file content:')
 f = open(file,'a+')
 f.write(content)
 f.write('
')
 f.close()

def viewfile():
 file = raw_input('input filename:')
 strtemp = ''
 f = open(file,'r')
 for eachline in f:
 strtemp = strtemp + eachline
 return strtemp

def editfile():
 file = raw_input('input filename:')
 line = int(raw_input('input line number:'))
 newline = raw_input('input new line number:')
 f = open(file,'r')
 lines = f.readlines()
 f.close()
 if line > len(lines):
 return False
 lines[line-1] = newline
 f = open(file,'w')
 f.writelines(lines)
 f.close()

def showmenu():
 prompt = """
a)创建文件（提示输入文件名和任意行的文本输入）
b)显示文件（把文件的内容显示到屏幕）
c)编辑文件（提示输入要修改的行，然后让用户进行修改）
d)保存文件
e)退出
请输入操作选项（a、b、c、d、e）："""
 while True:
 try:
 commnet = raw_input(prompt).strip()[0].lower()
 except(KeyboardInterrupt,EOFError):
 commnet = 'e'
 if commnet == 'a':
 createfile()
 elif commnet == 'b':
 viewfile()
 elif commnet == 'c':
 editfile()
 elif commnet == 'd':
 pass
 elif commnet == 'e':
 break
 else:
 continue
#if __name__ == '__main__':
# showmenu()

def func16():
 filename = raw_input('input file:')
 filech = raw_input('input file character:')
 countnum = 0
 with open(filename,'r') as f:
 for eachline in f:
 countnum += eachline.count(filech)
 print 'character %s is count %d' % (filech,countnum)

import random
def func17(ch,countnum,length):
 firstlength = 0
 num = []
 while firstlength - countnum:
 chara = random.choice(xrange(255))
 if ch == chara:
 continue
 else:
 num.append(chara)
 firstlength -= 1
 for i in range(countnum):
 num.append(ch)
 newnum = []
 while length:
 i = int(random.random() * length)
 newnum.append(num[i])
 del num[i]
 length -= 1
 return newnum

import zipfile
def func18(filename):
 with zipfile.ZipFile('e:\hello.zip','w') as f:
 f.write(filename)

def func19(dirname):
 with zipfile.ZipFile('e:\test.zip','w') as f:
 for root,dirs,files in os.walk(dirname):
 f.write(root)
 for file in files:
 f.write(os.path.join(root,file))

import time
def func20():
 filename = raw_input('zip file name:')
 print 'size:%.2f' % (float(os.stat(filename).st_size)/1024/1024),"MB"
 f = zipfile.ZipFile(filename,'r')
 print 'filename datetime size compresssize rate'
 for info in f.infolist():
 #t = time.ctime(time.mktime(tuple(list(info.date_time) + [0,0,0])))
 #print '%s	%s	%d	%d	' % (info.filename,t,info.file_size,
 # info.compress_size)
 print info.filename,info.file_size,info.compress_size

 f.close()