Python Read and write files

# python read-write files

# # code
-----------------------------
"' Python
#! /usr/bin/python
Import Os,sys

Try
Fsock = open ("d:/svntest/test.py", "R")
Except IOError:
Print "The file don t exist, please double check!"
Exit ()
print ' The file mode is ', Fsock.mode
print ' The file name is ', Fsock.name
P = Fsock.tell ()
print ' The postion is%d '% (P)
Fsock.close ()

#Read file
Fsock = open ("d:/svntest/test.py", "R")
Alllines = Fsock.readlines ()
#Method 1
For Eachline in Fsock:
Print Eachline

#Method 2
print ' Star ' + ' = ' *30
For Eachline in Alllines:
Print Eachline
print ' End ' + ' = ' *30
Fsock.close ()

#write This file
Fsock = open ("d:/svntest/test.py", "a")
Fsock.write ("" "
#Line 1 Just for test purpose
#Line 2 Just for test purpose
#Line 3 Just for test Purpose "" ")
Fsock.close ()

#check The file status
S1 = fsock.closed
if True = = S1:
print ' The file is closed '
Else
print ' The file donot close '
```

# # References
-----------------------------
-[Rookie tutorial] (http://www.runoob.com/python/file-methods.html)

Python file (file) method

The file object is created using the Open function, and the following table lists the functions commonly used by file objects:

Serial Number	Method and Description
1	File.close () Close the file. The file can no longer read and write after closing.
2	File.flush () Refreshes the file internal buffer, directly writes the internal buffer data immediately to the file, rather than passively waits for the output buffer to write.
3	File.fileno () Returns an integer that is a file descriptor (Descriptor FD Integer) that can be used in some of the underlying operations, such as the Read method of the OS module.
4	File.isatty () Returns True if the file is connected to an end device, otherwise False is returned.
5	File.next () Returns the next line of the file.
6	File.read ([size]) Reads the specified number of bytes from the file, if none is given or is negative.
7	File.readline ([size]) Reads the entire line, including the "\ n" character.
8	File.readlines ([Sizehint]) Reads all rows and returns a list, and if given sizeint>0, returns a row with a sum of approximately sizeint bytes, the actual read value may be larger than sizhint because the buffer needs to be populated.
9	File.seek (offset[, whence]) Set the current location of the file
10	File.tell () Returns the current location of the file.
11	File.truncate ([size]) Intercepts the file, the truncated byte is specified by size, and the default is the current file location.
12	File.write (str) Writes a string to the file without a return value.
13	File.writelines (Sequence) Writes a list of sequence strings to the file and adds a newline character to each line if a line break is required.

Python Read and write files