Online Learning Platform
Python String Practice Problems
Write a Python program to convert the second half of a string to uppercase.
"banana"
banANA
text = "banana"mid = len(text) // 2print(text[:mid] + text[mid:].upper())banANA
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Write a Python program to count the leap years in a range given as a string like “1981-2001”.
"1981-2001"
Total leap years: 5 [1984, 1988, 1992, 1996, 2000]
calendar.isleap.import calendar text = "1981-2001"start, end = map(int, text.split("-"))leaps = [y for y in range(start, end + 1) if calendar.isleap(y)]print("Total leap years:", len(leaps), leaps)Total leap years: 5 [1984, 1988, 1992, 1996, 2000]
map(int, ...) converts both parts.
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Write a Python program to extract the name part of an email address (without trailing digits).
"student1@gmail.com"
student
email = "student1@gmail.com"name = email.split("@")[0].rstrip("0123456789")print(name)student
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Write a Python program to add two strings as numbers and return a string.
"3", "7"
'10' | without conversion: 37
a, b = "3", "7"print(repr(str(int(a) + int(b))), "| without conversion:", a + b)'10' | without conversion: 37
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Write a Python program to split a multi-line string into a list of lines.
a three-line string
['This string Contains', 'Multiple', 'Lines']
splitlines().text = """This string ContainsMultipleLines"""print(text.splitlines())['This string Contains', 'Multiple', 'Lines']
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Write a Python program to extract the numbers from a string.
"python 456 self learning 89"
[456, 89]
text = "python 456 self learning 89"print([int(w) for w in text.split() if w.isdigit()])[456, 89]
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Write a Python program to measure how similar two strings are.
"Learning is fun in Sqatools", "Sqatools Online Learning Platform"
Similarity: 0.4 Word overlap (Jaccard): 0.29
difflib.SequenceMatcher returns a ratio from 0 (different) to 1 (identical).from difflib import SequenceMatcher s1 = "Learning is fun in Sqatools"s2 = "Sqatools Online Learning Platform"ratio = SequenceMatcher(None, s1, s2).ratio()print("Similarity:", round(ratio, 2)) w1, w2 = set(s1.lower().split()), set(s2.lower().split())print("Word overlap (Jaccard):", round(len(w1 & w2) / len(w1 | w2), 2))Similarity: 0.4 Word overlap (Jaccard): 0.29
The ratio compares matching blocks of characters.
A second measure compares shared words over all distinct words.
Different similarity measures give different numbers, so state which one you use.
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Write a Python program to remove unwanted characters from a string and capitalise it.
"sqa****too^^{ls"Sqatools
capitalize().text = "sqa****too^^{ls"print("".join(ch for ch in text if ch.isalpha()).capitalize())Sqatools
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Write a Python program to count the non-empty substrings of a string.
"sqatools12"
55 55
text = "sqatools12"n = len(text)print(n * (n + 1) // 2)print(sum(1 for i in range(n) for j in range(i + 1, n + 1)))55 55
The formula counts every pair of start and end positions.
The nested loops count them one by one and confirm the formula.
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Write a Python program to count the uppercase, lowercase, special and numeric characters in a string.
"@SqaTools.lin"
Special characters: 2 Uppercase characters: 2 Lowercase characters: 9 Numeric values: 0
text = "@SqaTools.lin"upper = lower = digits = special = 0for ch in text: if ch.isupper(): upper += 1 elif ch.islower(): lower += 1 elif ch.isdigit(): digits += 1 else: special += 1print("Special characters:", special)print("Uppercase characters:", upper)print("Lowercase characters:", lower)print("Numeric values:", digits)Special characters: 2 Uppercase characters: 2 Lowercase characters: 9 Numeric values: 0
“@SqaTools.lin” has 2 special characters (@ and .) and 9 lowercase letters; the original sample showed 1 and 8.
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