6.Python深浅拷贝
str1= str2=str1.copy()print(str1)
print(str2)
#
#
str2=10;
print(str1)
print(str2)
#
#
str3=[,"jiaxin",'john']
str4=str3.copy()
print(str4)
#[, 'jiaxin', 'john']
str4="jiaxin01"
print(str3) #str3不变，str4改变
print(str4)
# [, 'jiaxin', 'john']
# [, 'jiaxin01', 'john']
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