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:

Solution 1

Just add another line between your function definitions :

1 line :

2 lines:

Solution 2

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.

Comments

[Kennet Celeste]

@march_seven if this solved your issue you can accept the answer so that the others will immediately find out this solved the problem

[Franz Deschler]

Why is this necessary? What happens if there is just 1 line between the functions?

[TT--]

@FranzDeschler nothing happens, it just does not conform to the style guide, python.org/dev/peps/pep-0008/#blank-lines

[Leo Ufimtsev]

Is it possible to turn this pep8 behaviour off?

[Alan Bagel]

@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.

[Gulzar]

@grandBagel Some things are better left unknown