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three examples
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‎README.md‎

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@@ -61,6 +61,11 @@ Python小例子、小Demo一网打尽。Python基础、Web开发、数据科学
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30. [链式比较](链式比较.md)
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31. [不用else和if实现计算器](不用else和if实现计算器.md)
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32. [Python链式操作](Python链式操作.md)
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33. [检查list是否有重复元素](检查list是否有重复元素.md)
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34. [求列表中所有重复元素](求列表中所有重复元素.md)
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35. [是否相同字母但顺序不同](是否相同字母但顺序不同.md)
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36. [求字符串的字节长度](求字符串的字节长度.md)
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更多例子，正在每天更新...

‎src/anagram.py‎

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from collections import Counter
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# 检查两个字符串是否 相同字母异序词，简称：互为变位词
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def anagram(str1, str2):
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return Counter(str1) == Counter(str2)
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anagram('eleven+two', 'twelve+one') # True 这是一对神器的变位词
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anagram('eleven', 'twelve') # False

‎src/find_all_duplicates.py‎

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from collections import Counter
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def find_all_duplicates(lst):
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c = Counter(lst)
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return list(filter(lambda k: c[k] > 1, c))
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find_all_duplicates([1, 2, 2, 3, 3, 3]) # [2,3]

‎src/has_duplicates.py‎

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def has_duplicates(lst):
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return len(lst) == len(set(lst))
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x = [1, 1, 2, 2, 3, 2, 3, 4, 5, 6]
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y = [1, 2, 3, 4, 5]
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has_duplicates(x) # False
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has_duplicates(y) # True

‎src/str_byte_len.py‎

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def str_byte_len(mystr):
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return (len(mystr.encode('utf-8')))
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str_byte_len('i love python') # 13(个字节)
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str_byte_len('字符') # 6(个字节)

‎是否相同字母但顺序不同.md‎

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---
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title: C是否相同字母但顺序不同
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tags: Counter
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---
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```python
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from collections import Counter
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# 检查两个字符串是否 相同字母异序词，简称：互为变位词
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def anagram(str1, str2):
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return Counter(str1) == Counter(str2)
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anagram('eleven+two', 'twelve+one') # True 这是一对神器的变位词
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anagram('eleven', 'twelve') # False
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```

‎检查list是否有重复元素.md‎

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---
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title: 检查list是否有重复元素
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tags: list,set
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---
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```python
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def has_duplicates(lst):
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return len(lst) == len(set(lst))
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x = [1, 1, 2, 2, 3, 2, 3, 4, 5, 6]
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y = [1, 2, 3, 4, 5]
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has_duplicates(x) # False
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has_duplicates(y) # True
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```

‎求列表中所有重复元素.md‎

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---
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title: 查找列表中所有重复元素
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tags: list,Counter
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---
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```python
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from collections import Counter
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def find_all_duplicates(lst):
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c = Counter(lst)
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return list(filter(lambda k: c[k] > 1, c))
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find_all_duplicates([1, 2, 2, 3, 3, 3]) # [2,3]
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```

‎求字符串的字节长度.md‎

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---
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title: 求字符串的字节长度
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tags: str
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---
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```python
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def str_byte_len(mystr):
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return (len(mystr.encode('utf-8')))
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str_byte_len('i love python') # 13(个字节)
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str_byte_len('字符') # 6(个字节)

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