56 lines
1.8 KiB
Python
56 lines
1.8 KiB
Python
def get_message(argv: list[str]) -> str:
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"""check arguments and return string"""
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# https://docs.python.org/3.10/reference/simple_stmts.html?highlight=assert#the-assert-statement
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assert len(argv) < 3, "too much arguments"
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if len(argv) == 2:
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return argv[1]
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# stdin https://docs.python.org/3/library/sys.html#sys.stdin
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print("What is the text to count?")
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msg = sys.stdin.readline(424242)
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return msg
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def main(argv: list[str]):
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"""displays stats on string"""
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try:
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msg = get_message(argv)
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except AssertionError as err:
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print("AssertionError:", err)
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return
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char_count = len(msg)
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print("The text contains", char_count, "characters:")
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# filter() https://docs.python.org/3.10/library/functions.html#filter
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upper_count = len(list(filter(str.isupper, msg)))
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print(upper_count, "upper letters")
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# generator expressions
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# https://docs.python.org/3.10/reference/expressions.html#generator-expressions
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lower_count = sum(1 for char in msg if char.islower())
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print(lower_count, "lower letters")
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# in https://docs.python.org/3/reference/expressions.html#in
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punctuation = r"""!"#$%&'()*+,-./:;<=>?@[\]^_`{|}~"""
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punctuation_count = sum(1 for char in msg if char in punctuation)
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print(punctuation_count, "punctuation marks")
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# array.count()
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# https://docs.python.org/3.10/library/array.html?highlight=count#array.array.count
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space_count = msg.count(" ") + msg.count("\n")
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print(space_count, "spaces")
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# list comprehension
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# https://docs.python.org/3.10/tutorial/datastructures.html#list-comprehensions
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digits_count = len([char for char in msg if char.isdigit()])
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print(digits_count, "digits")
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if __name__ == "__main__":
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import sys
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main(sys.argv)
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