is_pangram.py

"""
wiki: https://en.wikipedia.org/wiki/Pangram
"""


defis_pangram(
input_str: str="The quick brown fox jumps over the lazy dog",
) ->bool:
"""
 A Pangram String contains all the alphabets at least once.
 >>> is_pangram("The quick brown fox jumps over the lazy dog")
 True
 >>> is_pangram("Waltz, bad nymph, for quick jigs vex.")
 True
 >>> is_pangram("Jived fox nymph grabs quick waltz.")
 True
 >>> is_pangram("My name is Unknown")
 False
 >>> is_pangram("The quick brown fox jumps over the la_y dog")
 False
 >>> is_pangram()
 True
 """
# Declare frequency as a set to have unique occurrences of letters
frequency=set()

# Replace all the whitespace in our sentence
input_str=input_str.replace(" ", "")
foralphaininput_str:
if"a"<=alpha.lower() <="z":
frequency.add(alpha.lower())
returnlen(frequency) ==26


defis_pangram_faster(
input_str: str="The quick brown fox jumps over the lazy dog",
) ->bool:
"""
 >>> is_pangram_faster("The quick brown fox jumps over the lazy dog")
 True
 >>> is_pangram_faster("Waltz, bad nymph, for quick jigs vex.")
 True
 >>> is_pangram_faster("Jived fox nymph grabs quick waltz.")
 True
 >>> is_pangram_faster("The quick brown fox jumps over the la_y dog")
 False
 >>> is_pangram_faster()
 True
 """
flag= [False] *26
forcharininput_str:
ifchar.islower():
flag[ord(char) -97] =True
elifchar.isupper():
flag[ord(char) -65] =True
returnall(flag)


defis_pangram_fastest(
input_str: str="The quick brown fox jumps over the lazy dog",
) ->bool:
"""
 >>> is_pangram_fastest("The quick brown fox jumps over the lazy dog")
 True
 >>> is_pangram_fastest("Waltz, bad nymph, for quick jigs vex.")
 True
 >>> is_pangram_fastest("Jived fox nymph grabs quick waltz.")
 True
 >>> is_pangram_fastest("The quick brown fox jumps over the la_y dog")
 False
 >>> is_pangram_fastest()
 True
 """
returnlen({charforcharininput_str.lower() ifchar.isalpha()}) ==26


defbenchmark() ->None:
"""
 Benchmark code comparing different version.
 """
fromtimeitimporttimeit

setup="from __main__ import is_pangram, is_pangram_faster, is_pangram_fastest"
print(timeit("is_pangram()", setup=setup))
print(timeit("is_pangram_faster()", setup=setup))
print(timeit("is_pangram_fastest()", setup=setup))
# 5.348480500048026, 2.6477354579837993, 1.8470395830227062
# 5.036091582966037, 2.644472333951853, 1.8869528750656173


if__name__=="__main__":
importdoctest

doctest.testmod()
benchmark()