统计Python中字符串中出现的次数

# 统计字符串中某个字符出现的次数
s = "geek-docs.com"
count = s.count("e")
print(count)

# 统计字符串中子串出现的次数
s = "geek-docs.com is a great website. geek-docs.com"
count = s.count("geek-docs.com")
print(count)

# 忽略大小写统计字符串中某个字符出现的次数
s = "Geek-Docs.com is a great website. geek-docs.com"
count = s.lower().count("geek-docs.com")
print(count)

# 统计字符串中多个字符同时出现的次数
s = "geek-docs.com is a great website. geek-docs.com"
chars = ["e", "o", "m"]
counts = {char: s.count(char) for char in chars}
print(counts)

import re

# 使用正则表达式统计字符串中某个字符出现的次数
s = "geek-docs.com is a great website. geek-docs.com"
count = len(re.findall("e", s))
print(count)

# 统计字符串中中文字符出现的次数
s = "geek-docs.com是一个很棒的网站。geek-docs.com"
count = len([char for char in s if '\u4e00' <= char <= '\u9fff'])
print(count)

# 统计字符串中单词出现的次数
s = "Geek-Docs.com is a great website. geek-docs.com"
words = s.split()
word_counts = {word: s.count(word) for word in words}
print(word_counts)

# 统计字符串中行数
s = "Geek-Docs.com\nis a great\nwebsite.\ngeek-docs.com"
lines = s.splitlines()
line_count = len(lines)
print(line_count)

# 统计字符串中空格、数字和字母的数量
s = "Geek-Docs.com 123 is a great website."
spaces = sum(1 for char in s if char.isspace())
digits = sum(1 for char in s if char.isdigit())
letters = sum(1 for char in s if char.isalpha())
print("Spaces:", spaces)
print("Digits:", digits)
print("Letters:", letters)

# 统计特定字符的位置
s = "geek-docs.com is a great website. geek-docs.com"
char = "e"
positions = [i for i, c in enumerate(s) if c == char]
print(positions)

# 统计特定子串的位置
s = "geek-docs.com is a great website. geek-docs.com"
substring = "geek-docs.com"
positions = [i for i in range(len(s)) if s.startswith(substring, i)]
print(positions)

# 统计字符串中重复的子串
s = "geek-docs.com is a great website. geek-docs.com"
sub = "geek-docs.com"
count = sum(1 for i in range(len(s)) if s[i:i+len(sub)] == sub)
print(count)

# 统计字符串中连续重复字符的次数
s = "geek-docs.com is a great website. geek-docs.com"
count = 0
prev_char = None
for char in s:
    if char == prev_char:
        count += 1
    prev_char = char
print(count)

# 统计字符串中不重复字符的数量
s = "geek-docs.com is a great website. geek-docs.com"
unique_chars = set(s)
count = len(unique_chars)
print(count)

# 统计特定字符出现的次数并替换
s = "geek-docs.com is a great website. geek-docs.com"
char = "e"
count = s.count(char)
new_s = s.replace(char, "E")
print("Original String:", s)
print("New String:", new_s)
print("Number of replacements:", count)

# 统计特定子串出现的次数并替换
s = "geek-docs.com is a great website. geek-docs.com"
sub = "geek-docs.com"
count = s.count(sub)
new_s = s.replace(sub, "GEEK-DOCS")
print("Original String:", s)
print("New String:", new_s)
print("Number of replacements:", count)