Answered: got an error message for the answer…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

I got an error message for the answer Bartleby gave me last night as follows

Input Answer

alphabet = "abcdefghijklmnopqrstuvwxyz"
test_dups = ["zzz","dog","bookkeeper","subdermatoglyphic","subdermatoglyphics"]
def histogram(s):
d=dict()
for c in s:
if c not in d:
d[c]=1

else:
d[c]+=1
return d;
def has_duplicate(string):
# return false if each letter in s is not distinct
h=histogram(string)
for k,v in h.items():
if v>1:
return true
return false
for string in test_dups:
if has_duplicate(string):
printf(string,"has duplicates")
else:
print(string,"has no duplicates")
def main():
test_dups_loop()
if_name=='_main_'
main()

THE ERROR MESSAGE said ***TRUE NEEDS TO BE DEFINED.

this is all I need from the answer code I received.

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