标签：strip 取数 rip except lov rod cep 使用 write
#!/usr/bin/env python
with open(‘pi‘) as file_object:
contents = file_object.read()
print(contents)
===================================
3.1415926
5212533
2324255
1、逐行读取
#!/usr/bin/env python
filename = ‘pi‘
with open(filename) as file_object:
for line in file_object:
print(line)
===================================
3.1415926
5212533
2324255
#!/usr/bin/env python
filename = ‘pi‘
with open(filename) as file_object:
for line in file_object:
print(line.rstrip())
==================
3.1415926
5212533
2324255
2、创建一个包含文件各行内容的列表
#!/usr/bin/env python
filename = ‘pi‘
with open(filename) as file_object:
lines = file_object.readlines() #readlines()方法是从文件中读取每一行，并将其存储在一个列表中
for line in lines:
print(line.rstrip())
==============================
3.1415926
5212533
2324255
3、使用文件内容
#!/usr/bin/env python
filename = ‘pi‘
with open(filename) as file_object:
lines = file_object.readlines()
pi_string = ‘‘
for line in lines:
pi_string += line.strip()
print(pi_string)
print(len(pi_string))
========================================
3.141592652125332324255
23
1、写入空文件
#!/usr/bin/env python
filename = ‘programming.txt‘
with open(filename,‘w‘) as file_object:
file_object.write("I love programming!")
2、写入多行
#!/usr/bin/env python
filename = ‘programming.txt‘
with open(filename,‘w‘) as file_object:
file_object.write("I love programming!\n")
file_object.write("yes!\n")
3、附加到文件
#!/usr/bin/env python
filename = ‘pi‘
with open(filename,‘a‘) as file_object:
file_object.write("I love programming!\n")
file_object.write("yes!\n")
1、使用try-except代码块
#!/usr/bin/env python
try:
print(5/0)
except ZeroDivisionError:
print("You cant divide by zero!")
标签：strip 取数 rip except lov rod cep 使用 write
原文地址：http://www.cnblogs.com/caicairui/p/7748380.html
