Printing help docstring of all the functions in the string module: Python

Question

I am trying to print all the functions and their help docstrings in the strings module but am not getting the desired results. Below are the things which I have tried:

r = 'A random string'

1.  [help(fn) for fn in r.__dir__() if not fn.startswith('__')]
2.  [help(r.fn) for fn in r.__dir__() if not fn.startswith('__')]
3.  [fn.__doc__ for fn in r.__dir__() if not fn.startswith('__')]
4.  [r.fn.__doc__ for fn in r.__dir__() if not fn.startswith('__')]

and a few things more. Some of them throw errors saying that r does not have attribute named 'fn'. Others just print the help documentation for the 'str' function. Is there any way I can print this for all the functions dynamically?

Valentino · Accepted Answer · 2019-01-01 15:20:37Z

1

In python2:

for i in dir(r):
    if not i.startswith('__'):
        print getattr(r, i).__doc__

In python3:

for i in dir(r):
    if not i.startswith('__'):
        print(getattr(r, i).__doc__)

(it's basically the same, changes the print function only). You need to get the method object wth getattr in order to show its __doc__ attribute.

answered Jan 1, 2019 at 15:20

Valentino

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MarkReedZ · Accepted Answer · 2019-01-01 14:57:27Z

0

To print the docstring you use func.__doc__.

r = 'A random string'

for fn in r.__dir__():
  if not fn.startswith("__"):
    print ("Function:",fn)
    print (fn.__doc__)
    print()

answered Jan 1, 2019 at 14:57

MarkReedZ

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1 Comment

Gsbansal10 Over a year ago

Have you even tried running your code. There is an error in your first print statement. It should be print("Function: %s" %fn). Furthermore, this code only prints the documentation of str function multiple times. Please check it once again and revert.

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