Three ways Python reads the contents of a file row by line

Method One:

The code is as follows:

f = open ("Foo.txt") # Returns a File object
line = F.readline () # Call the ReadLine () method of the file
While line:
Print line, # followed by ', ' will ignore newline characters
# print (line, end = ") # used in Python 3
line = F.readline ()

F.close ()

Method Two:

The code is as follows:

For line in open ("Foo.txt"):
Print line,

Method Three:

The code is as follows:

f = open ("C:\\1.txt", "R")
lines = F.readlines () #读取全部内容
For line in lines
Print Line

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