x=5y=10ifx!=y:print("x is not equal to y")else:print("x is equal to y")# 输出 x is...
print "Line 1 - a is not equal to b" if ( a != b ): print "Line 2 - a is not equal to b" else: print "Line 2 - a is equal to b" if ( a <> b ): print "Line 3 - a is not equal to b" else: print "Line 3 - a is equal to b" if ( a < b ): print "...
这是Python 关键字的完整列表: FalseawaitelseimportpassNonebreakexceptinraiseTrueclassfinallyisreturnandcontinueforlambdatryasdeffromnonlocalwhileassertdelglobalnotwithasyncelififoryield 你不需要记住这个列表。在大多数开发环境中,关键字会以不同的颜色显示;如果你尝试将其作为变量名使用,你会知道的。 2.4. 导入...
If python function default input is mutable, calling the function will change on top of. defmutable_parameter(lst=[]):iflstisNone:lst=[]lst.append(1)returnlstprint(mutable_parameter())print(mutable_parameter())[1][1]use'lst=None'instead! Modifying while iterating First make sure modifying ...
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python3 -m timeit -s 'x=[1,2,3,4,5,6]' 'y=x[3]' 10000000 loops, best of 5: 22.2 nsec per loop python3 -m timeit -s 'x=(1,2,3,4,5,6)' 'y=x[3]' 10000000 loops, best of 5: 21.9 nsec per loop 当然,如果你想要增加、删减或者改变元素,那么列表显然更优。原因你现在肯...
Not equal x != y > Greater than x > y < Less than x < y >= Greater than or equal to x >= y <= Less than or equal to x <= y 逻辑运算符 Operator Description Example and Returns True if both statements are true x < 5 and x < 10 or Returns True if one of the statements...
x > y if x is greater than y 2 > 3 0 x >= y if x is greater than or equal to y 2 >= 3 0 x == y if x is equal to y 2 == 3 0 x != y if x is not equal to y 2 != 3 1 TheCalculate Valuetool allows the use of thePythonmathmodule to perform mor...
题意: 使用Python解决计算,数据结构和字符串的问题。 解析: 三个问题都涉及字符串处理的问题,将对应的字符转换为整数。 对于本程序,用户应该有三种输入...
Python3.x中的35个保留字 andasassertasyncawaitbreakclasscontinuedefdelelifelseexceptFalsefinallyforfromglobalifimportinislambdaNonenonlocalnotorpassraisereturnTruetrywhilewithyield Python二级考试涉及到的保留字一共有22个。选学5个:None、finally、lambda、pass、with。