I am just experimenting a little bit with Python and recursive functions.
For now, I wanted to write a function, which splits up a number into 4 pieces until it is smaller than 4.
So, for instance, I feed the function 20, it should then return
[1.25,1.25,1.25,1.25,1.25,1.25,1.25,1.25,1.25,1.25,1.25,1.25,1.25,1.25,1.25,1.25]
I get that result if I print the outcome before the return statement, but cannot get that result if I return the variable which contains these values.
def break_up_number_into_fours(input):
flag = 0
input_list = []
full_result = []
if isinstance(input, list):
input_list.extend(input)
else:
input_list.append(input)
for item in input_list:
if item > 4:
result = [item/4]*4
full_result.extend(result)
flag = 1
else:
full_result.append(item)
if flag == 1:
break_up_number_into_fours(full_result)
else:
print(full_result)
return full_result
test = break_up_number_into_fours(20)
print(test)
What could be wrong in the code?
Much obliged!
You did not return any value from your recursive call break_up_number_into_fours(full_result) , you need to do it like:
def break_up_number_into_fours(input):
flag = 0
input_list = []
full_result = []
if isinstance(input, list):
input_list.extend(input)
else:
input_list.append(input)
for item in input_list:
if item > 4:
result = [item/4]*4
full_result.extend(result)
flag = 1
else:
full_result.append(item)
if flag == 1:
return break_up_number_into_fours(full_result) // here you need to return the value in respective recursive call
else:
print(full_result)
return full_result
test = break_up_number_into_fours(20)
print(test)
Output:
[1.25, 1.25, 1.25, 1.25, 1.25, 1.25, 1.25, 1.25, 1.25, 1.25, 1.25, 1.25, 1.25, 1.25, 1.25, 1.25]
[1.25, 1.25, 1.25, 1.25, 1.25, 1.25, 1.25, 1.25, 1.25, 1.25, 1.25, 1.25, 1.25, 1.25, 1.25, 1.25]
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