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Given that the new Python 3.5 allows type hinting with type signatures I want to use the new feature, but I don't know how to fully annotate a function with the following structure:
def yieldMoreIfA(text:str):
if text == "A":
yield text
yield text
return
else:
yield text
return
What's the correct signature?
799
Using signature() function We can get function Signature with the help of signature() Function. It takes callable as a parameter and returns the annotation. It raises a value Error if no signature is provided. If the Invalid type object is given then it throws a Type Error.
A generator is a special type of function which does not return a single value, instead, it returns an iterator object with a sequence of values.
If a function contains at least one yield statement (it may contain other yield or return statements), it becomes a generator function. Both yield and return will return some value from a function.
A generator expression is an expression that returns a generator object. Basically, a generator function is a function that contains a yield statement and returns a generator object. For example, the following defines a generator function: def squares(length): for n in range(length): yield n ** 2.
There is a Generator[yield_type, send_type, return_type] type:
from typing import Generator
def yieldMoreIfA(text: str) -> Generator[str, None, None]:
if text == "A":
yield text
yield text
return
else:
yield text
return
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