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This article mainly explains "how to read and write documents in Python". Friends who are interested may wish to have a look. The method introduced in this paper is simple, fast and practical. Now let the editor take you to learn "how to read and write files in Python"!

CharacterMeaning'r'open for reading (default) 'w'open for writing, truncating the file first'a'open for writing, appending to the end of the file if it exists'b'binary mode't'text mode (default)' + 'open a disk file for updating (reading and writing)' U'universal newline mode (for backwards compatibility Should not be used in new code) mode describes rt reading text, default mode rb reads binary data wt writes text wb writes binary r + does not empty the original file, reads and writes w + empties the original file, and reads and writes a + reads and writes at the end of the file

First, create a new "abc.txt" file on the left. The contents of the file are as follows:

I

Love

CSDN

Read-only mode (default mode)

> f=open ("C:/Users/Administrator/Desktop/abc.txt", "r") > print (f.read ()) IloveCSDN > f.close ()

Write mode

> f=open ("C:/Users/Administrator/Desktop/abc.txt", "w") > f.write ("test") > f.close ()

The result of the output is:

Test

When using "w" mode, python will overwrite the original file and form a new one. Note here that if the written file does not exist, python will automatically create a new file.

Additional mode

> f=open ("C:/Users/Administrator/Desktop/abc.txt", "a") > f.write ("test") > f.close ()

The result of the output is:

I

Love

CSDNtest

In addition, we can also set how to read and write:

To read in binary mode:

> f=open ("C:/Users/Administrator/Desktop/abc.txt", "rb") > print (f.read ()) > f.close () bounded I\ r\ nlove\ r\ nCSDN'

One of the great uses of binary reading is to save matplotlib's interactive picture page:

Save the interactive picture page

Import matplotlib.pyplot as pltimport pickle as pl# calls matplotlib's figure object fig = plt.figure () x = [1pje 2je 3je 4je 5] y = [1pje 2je 3je 4je 5] plt.plot (xmemy) # serializes the figure object and saves the pl.dump (fig,open ('C GunpUserUserUserandUserandDesktopcharpfig.pickleChargedjigwb'))

Read the interactive page:

Import matplotlib.pyplot as pltimport pickle as pl# loads the serialized file fig = pl.load (open ('open) plt.show () # get the picture information print (fig.axes [0] .lines [0] .get _ file ()) so far, I believe you have a deeper understanding of "how to read and write files in Python", you might as well do it in practice! Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

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