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Python practice problems help beginners to become experts in a python programming language with a small amount of practice effort.
Write a Python program to split a string into words and join them with “-“.
"Hello world"
['Hello', 'world'] Hello-world
split() then "-".join().parts = "Hello world".split()print(parts)print("-".join(parts))['Hello', 'world'] Hello-world
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Write a Python program to remove newline characters from a string.
"objectoriented\nprogramming\n"
'objectoriented\nprogramming' 'objectorientedprogramming'
strip() for the ends, replace("\n", "") for everywhere.text = "objectoriented\nprogramming\n"print(repr(text.rstrip("\n")))print(repr(text.replace("\n", "")))'objectoriented\nprogramming' 'objectorientedprogramming'
rstrip("\n") removes only trailing newlines.
replace removes them everywhere.
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Write a Python program to convert all the characters in a string to uppercase.
"I live in pune"
I LIVE IN PUNE
upper().print("I live in pune".upper())I LIVE IN PUNE
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Write a Python program to exchange the first and last letters of a string.
"We are learning python"
ne are learning pythoW
text = "We are learning python"print(text[-1] + text[1:-1] + text[0])ne are learning pythoW
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Write a Python program to check whether a string contains special characters.
"python$$#sqatools", "python"
python$$#sqatools -> has special characters ['$', '$', '#'] python -> no special characters []
for text in ["python$$#sqatools", "python"]: special = [ch for ch in text if not ch.isalnum() and not ch.isspace()] print(text, "->", "has special characters" if special else "no special characters", special)python$$#sqatools -> has special characters ['$', '$', '#'] python -> no special characters []
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Write a Python program to remove duplicate characters, keeping the first occurrence of each.
"sqatools"
sqatol
dict.fromkeys keeps the first occurrence in order.text = "sqatools"print("".join(dict.fromkeys(text)))sqatol
Dictionary keys are unique and keep insertion order, so joining them gives the de-duplicated string.
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Write a Python program to print the characters at odd index positions.
"abcdefg"
bdf
print("abcdefg"[1::2])bdf
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Write a Python program to count the consonants in a string.
"sqltools"
6
text = "sqltools"print(sum(1 for ch in text.lower() if ch.isalpha() and ch not in "aeiou"))6
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Write a Python program to count the vowels in a string.
"I am learning python"
6
text = "I am learning python"print(sum(1 for ch in text.lower() if ch in "aeiou"))6
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Write a Python program to check whether a string contains a digit.
"python1", "python"
python1 has a number python has no number
any(ch.isdigit() for ch in text).for text in ["python1", "python"]: has = any(ch.isdigit() for ch in text) print(text, "has a number" if has else "has no number")python1 has a number python has no number
any() stops at the first True.
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