Please note, this is a STATIC archive of website www.w3resource.com from 19 Jul 2022, cach3.com does not collect or store any user information, there is no "phishing" involved.
w3resource

Python: sum() function

sum() function

The sum() function is used to get the sum of all items in an iterable.

Version:

(Python 3.2.5)

Syntax:

sum(iterable[, start])

Parameter:

Name Description Required /
Optional
iterable An iterable (list, tuple, dict etc) whose item's sum is to be computed. Required
start A value that is added to the return value. Optional

Return value:

The sum of the given iterable.

Example: Python sum()

num = [3.5, 5, 2, -5]

# start parameter is not provided
numSum = sum(num)
print(numSum)

# start = 15
numSum = sum(num, 15)
print(numSum)

Output:

5.5
20.5

Pictorial Presentation:

Python: Built-in-function - sum() function

Pictorial Presentation:

Python: Built-in-function - sum() function

Python Code Editor:

Previous: str()
Next: tuple()

Test your Python skills with w3resource's quiz



Python: Tips of the Day

Find current directory and file's directory:

To get the full path to the directory a Python file is contained in, write this in that file:

import os 
dir_path = os.path.dirname(os.path.realpath(__file__))

(Note that the incantation above won't work if you've already used os.chdir() to change your current working directory, since the value of the __file__ constant is relative to the current working directory and is not changed by an os.chdir() call.)

To get the current working directory use

import os
cwd = os.getcwd()

Documentation references for the modules, constants and functions used above:

  • The os and os.path modules.
  • The __file__ constant
  • os.path.realpath(path) (returns "the canonical path of the specified filename, eliminating any symbolic links encountered in the path")
  • os.path.dirname(path) (returns "the directory name of pathname path")
  • os.getcwd() (returns "a string representing the current working directory")
  • os.chdir(path) ("change the current working directory to path")

Ref: https://bit.ly/3fy0R6m