Python may not write pass, but write a string placeholder

We know we can write pass Come and take the place , If not pass, It's empty there , Will report a mistake .

if 1==1:
pass
print("hh")

In fact, you don't have to write pass, Write a string （ It's equivalent to annotation ） Can have the same effect , however # It is not possible to comment on .

if 1==1:
'dd'
print("hh")

The same is true for functions ：

def testfun():
'ddd'
testfun()
print("fun")