files.md

File

• Read File
• Write a File
• Copy File
• Move File
• Readline

Read a file

In Python 3, If files do not open in binary mode, the encoding will be determined by locale.getpreferredencoding(False) or user's input.

>>> with open("/etc/hosts", encoding="utf-8") as f:
...     content = f.read()
...
>>> print(type(content))
<class 'str'>

In python3 binary mode

>>> with open("/etc/hosts", "rb") as f:
...     content = f.read()
...
>>> print(type(content))
<class 'bytes'>

In python2

## The content of the file is a byte string, not a Unicode string.
>>> with open("/etc/passwd") as f:
...    content = f.read()
>>> print(type(content))
<type 'str'>
>>> print(type(content.decode("utf-8")))
<type 'unicode'>

Write a File

>>> file_content = "Python is great!"
>>> with open("check.txt", "w") as file:
...     file.write(file_content)

Copy a file

>>> from distutils.file_util import copy_file
>>> copy_file("a", "b")
('b', 1)

Move a File

>>> from distutils.file_util import move_file
>>> move_file("./a", "./b")
'./b'

Readline

## If you are not using linux machine try to change the file path to read
>>> with open("/etc/hosts") as f:
...     for line in f:
...         print(line, end='')
...
127.0.0.1       localhost
255.255.255.255     broadcasthost
::1             localhost

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