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PythonStudy
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PythonStudy
/
function
/
function_1.py
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PythonStudy
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function
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function_1.py
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# 함수
"""
def 함수_이름(매개변수):
수행할_문장1
수행할_문장2
의 형태
"""
def
add
(
a
,
b
):
return
a
+
b
print
(
add
(
3
,
4
))
def
say
():
return
"Hi"
print
(
say
())
def
add
(
a
,
b
):
print
(
"%d, %d의 합은 %d입니다."
%
(
a
,
b
,
a
+
b
))
add
(
3
,
4
)
a
=
add
(
3
,
4
)
print
(
a
)
# None은 리턴값이 없다는 것
# 매개변수를 지정하여 호출하기
def
sub
(
a
,
b
):
return
a
-
b
print
(
sub
(
a
=
7
,
b
=
3
))
print
(
sub
(
b
=
7
,
a
=
3
))
# 여러 개의 잆력값을 받는 함수
# -> 입력값이 몇 개든 상관없이 입력값을 전부 모아 튜플로 만들어줌
# -> args는 임의의 변수이고 *변수 의 형태로 애스터리스크 뒤 아무 변수나 설정해도 됨. 다만 args는 arguments의 약자로 관례적으로 자주 사용함.
def
add_many
(
*
args
):
result
=
0
for
i
in
args
:
result
+=
i
return
result
print
(
add_many
(
1
,
2
,
3
,
4
,
5
))
def
add_mul
(
choice
,
*
args
):
if
choice
==
"add"
:
result
=
0
for
i
in
args
:
result
+=
i
elif
choice
==
"mul"
:
result
=
1
for
i
in
args
:
result
*=
i
return
result
print
(
add_mul
(
"mul"
,
1
,
2
,
3
,
4
,
5
))
# **kwargs
# -> 딕셔너리 타입으로 리턴해줌
# -> 이 또한 **변수명 형태로 사용 시 변수명과 상관없이 사용 가능하며 관례적으로 kwargs(Keyword Arguments) 를 사용함.
def
print_kwargs
(
**
kwargs
):
print
(
kwargs
)
print_kwargs
(
a
=
1
)
print_kwargs
(
name
=
'foo'
,
age
=
3
)
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