PyCharm shows "PEP8: expected 2 blank lines, found 1"

Question

Consider the following code:

def add_function(a, b):
    c = str(a) + b
    print "c is %s" % c

def add_int_function(c, d):
    e = c + d
    print "the vaule of e is %d" % e

if __name__ =="__main__":
    add_function(59906, 'kugrt5')
    add_int_function(1, 2)

It always shows me: "expected 2 blank lines ，found 1" in aadd_int_function, but not in the add_function.

When I add two spaces in front of the def add_int_function(c, d): there is a error shows unindent does not match any outer indentation level in the end of add_function:

If you find and answer useful, accept that answer by clicking on its check-mark (like [here](http://i.stack.imgur.com/QpogP.png))so that other people will know the answer worked for you in the first look — Kennet Celeste, Oct 27 '16 at 12:24
PyCharm will fix it for you if you click on the code or press **Alt-Enter** and then click the yellow lightbulb and select **Reformat file** — TT--, Feb 07 '18 at 03:16

score 104 · Accepted Answer · answered Oct 27 '16 at 08:55

104

Just add another line between your function definitions :

1 line :

2 lines:

answered Oct 27 '16 at 08:55

Kennet Celeste

4,593
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@march_seven if this solved your issue you can accept the answer so that the others will immediately find out this solved the problem – Kennet Celeste Sep 15 '17 at 14:25
Why is this necessary? What happens if there is just 1 line between the functions? – Franz Deschler Feb 04 '18 at 11:16
4

@FranzDeschler nothing happens, it just does not conform to the style guide, https://www.python.org/dev/peps/pep-0008/#blank-lines – TT-- Feb 07 '18 at 03:10
2

Is it possible to turn this pep8 behaviour off? – Leo Ufimtsev Jun 30 '19 at 22:56
@Leo Ufimtsev Go to Settings -> Editor -> Inspections -> Python -> PEP 8 coding style violation. Then press the check mark to disable it. You can also change the severity if you want to. – Alan Bagel Aug 18 '21 at 13:15
@grandBagel Some things are better left unknown – Gulzar Dec 13 '21 at 16:00

score 9 · Answer 2 · answered Jan 27 '19 at 15:03

This is a pretty common question within the python community. After the release of PEP 8, new formatting styles were accepted into python. One of them states that after the definition of a class or function there must be two lines separating them. As such:

    def yadayada:
     print("two lines between the functions")


    def secondyadayada:
     print("this is the proper formatting")

So, you should never do it like:

    def yadayada:
     print("two lines between the functions")

    def secondyadayada:
     print("this is the proper formatting")

Or else PyCharm will throw that error at you.

score 2 · Answer 3 · answered May 19 '22 at 12:11

For people who wonders why it requires two blank lines

if you were to write in other languages it would be:

fun doSth() {
    print()
}

fun doSth1() {
    print()
}

but if you were to delete all the curly braces from the code you will see:

two blank lines between methods

fun doSth()
    print()
#
#
fun doSth1()
    print()
#

score 1 · Answer 4 · answered Feb 07 '22 at 11:10

Further clarification on @kennet-celeste & @shreyshrey 's answers,

Each function or class defined requires 2 spaces above and 2 spaces below. Unless the function is the last item in the script, in which the expected format is one blank line as an End of File marker. So:

# some code followed by 2 blank spaces


def function1():


def function2():


def function3():

PyCharm shows "PEP8: expected 2 blank lines, found 1"

4 Answers4

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