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+--- Thread: Why does my Switch trigger all Cases? (/thread-9432.html)
Why does my Switch trigger all Cases? - IAMK - Apr-08-2018
Hello, I'm a first time user of Python, but I have c++/VB.Net experience. I absolutely dread Python's syntax, but I need to learn it.
What is wrong with my implementation of this switch? Instead of only calling the function of the matching string, it calls all 3.
def f_3OAK():
print("Hello1.")
return False
def f_4OAK():
print("Hello2.")
return False
def f_5OAK():
print("Hello3.")
return False
def case(s_Input): #My definition of a Case Switch.
return {
'3OAK': f_3OAK(),
'4OAK': f_4OAK(),
'5OAK': f_5OAK()
}[s_Input]
while True:
case(input("\nPlease enter the win you wish to search for: "))Thank you in advance.
RE: Why does my Switch trigger all Cases? - woooee - Apr-08-2018
There is no "switch" or anything else that calls a function in the code you posted.
RE: Why does my Switch trigger all Cases? - IAMK - Apr-08-2018
@woooee,
case(input("\nPlease enter the win you wish to search for: ")) will call the case() function.
RE: Why does my Switch trigger all Cases? - Larz60+ - Apr-08-2018
IAMK - please post code directly rather than using links (which can cause security issues).
Read BBCODE on how to do this
RE: Why does my Switch trigger all Cases? - snippsat - Apr-08-2018
Some changes,
get() is nice as it also can span a message(None default) it something is not found.return in all function.def f_3OAK():
return("Hello1.")
def f_4OAK():
return("Hello2.")
def f_5OAK():
return("Hello3.")
def case(s_input):
return {
'3OAK': f_3OAK(),
'4OAK': f_4OAK(),
'5OAK': f_5OAK()
}.get(s_input, 'Not in dictionary')
user_input = input("\nPlease enter the win you wish to search for: ")
print(case(user_input))Test:Output:λ python sw.py
Please enter the win you wish to search for: 3OAK
Hello1.
λ python sw.py
Please enter the win you wish to search for: 3aaa
Not in dictionaryRE: Why does my Switch trigger all Cases? - IAMK - Apr-09-2018
(Apr-08-2018, 10:09 PM)snippsat Wrote: def case(s_input):
return {
'3OAK': f_3OAK(),
'4OAK': f_4OAK(),
'5OAK': f_5OAK()
}.get(s_input, 'Not in dictionary')
Thank you. This worked.
However, do you know why my code was printing all 3?
RE: Why does my Switch trigger all Cases? - snippsat - Apr-09-2018
(Apr-09-2018, 09:21 AM)IAMK Wrote: However, do you know why my code was printing all 3?Function calls in return dictionary will trigger all call.
Could do it like this.
def f_3OAK():
print("Hello1.")
def f_4OAK():
print("Hello2.")
def f_5OAK():
print("Hello3.")
def case(s_Input):
return {
'3OAK': f_3OAK,
'4OAK': f_4OAK,
'5OAK': f_5OAK
}[s_Input]
while True:
case(input("\nPlease enter the win you wish to search for: "))()