How to comment out multiple lines of code in Python?

1. In Visual Studio, blocks can be commented out by Ctrl+K+C and uncommented by Ctrl+K+U.

2. In PyDev (and in Aptana Studio with PyDev):
  - Ctrl + 4 - comment selected block
  - Ctrl + 5 - uncomment a selected block

3. In Eclipse using PyDev, you can select a code block and press Ctrl + #.

4. On Eric4 there is an easy way: select a block, type Ctrl+M to comment the whole block or Ctrl+alt+M to uncomment.

5. In JetBrains PyCharm on Mac use Command + / to comment/uncomment a selected block of code. On Windows, use CTRL + /.

You can't use /**/ to comment out multiple lines of code. You can replace it with ''' '''. See an example below:

'''
Hello, I'm a newbie in Python.
How can I comment out a block of code?
Thanks!!!
'''

print('Hello, world!')

hope it helpful for you.

You can use """ to help comment out a block of code in Python. See an example:

def add_stuff(a, b):
    result = a + b
    """
    Now we return the result, wee!
    Hurray! I'm so excited I can't contain
    my joy to just one or two lines!
    """
    return result

number = add_stuff(1, 2)
print(number)

It seems so easy!!!