这里statement1和statement2两个变量都为字符串,但是quantity这个变量为整数,因此print statement1 + quantity + statement2会报错TypeError: cannot concatenate 'str' and 'int' objects, 提示不能将字符串和整数拼接合并。解决的办法是使用str()这个函数将quantity从整数转化为字符串,举例如下: ...
解决方法:多行语句写到一行了,比如:if x == 2: print('OK')要分成两行写 PEP 8: line too long (82 > 79 characters) 解决方法:超过了每行的最大长度限制79 PEP 8: Simplify chained comparison 可简化连锁比较(例如:if a >= 0 and a <= 9: 可以简写为:if 0 <= a <= 9:) 如果想要选择性...
->Details about'object',use'object??'forextra details. In[1]:%run hello_world.py Hello world In[2]: IPython默认采用序号的格式In [2]:,与标准的>>>提示符不同。 2.2 IPython基础 在本节中,我们会教你打开运行IPython shell和jupyter notebook,并介绍一些基本概念。 运行IPython Shell 你可...
#NOTE:__init__()methodsNEVERhave areturnstatement.defvalue(self):#3"""The value (in knuts) of all the coins in this WizCoin object."""return(self.galleons*17*29)+(self.sickles*29)+(self.knuts)defweightInGrams(self):#4"""Returns the weight of the coins in grams."""return(self.g...
ifname ='迹忆客':print('success') SyntaxError: invalid syntax. Maybe you meant == or -= instead of = 错误是因为我们使用了一个等号而不是两个等号。 如果比较值,请确保使用双等号。 name ='迹忆客'# ✅ 比较时使用双等号ifname =='迹忆客':# 👇️ this runsprint('success')...
SyntaxError: multiple statements found while compiling a single statement 这是因为整体复制过去运行而产生的错误;解决方案如下: 方法一:先将第一行复制,敲一下回车,再将剩下的部分复制过去,运行; 方法二:Ctrl+N,新建一个,这时直接将代码复制进来,就不会产生这个问题了;直接在IDLE中编译,是每行都要回车的。如...
E712 (^) comparison to True should be ‘if cond is True:’ or ‘if cond:’ E713 test for membership should be ‘not in’ E714 test for object identity should be ‘is not’ E721 (^) do not compare types, use ‘isinstance()’ ...
>>> turtle.reset()>>> turtle.tracer(False)>>> t = time.time()>>> for i in range(100):turtle.pencolor(ls[i%10])turtle.fd(i*5)turtle.lt(90)if i==99: print(time.time()-t)5.0890655517578125>>> 如不关掉踪迹开关,画以下这种图形等得你不想看完结果: ...
total += xprint(total)# end of the if statementprint("This is always executed.") Run Code Here, the body ofifhas two statements. We know this because two statements (immediately afterif) start with indentation. We usually use four spaces for indentation in Python, although any number of ...
在f-string中用了星号*>>> f"Black holes {*all_black_holes} and revelations" File "<stdin>", line 1 (*all_black_holes) ^SyntaxError: f-string: cannot use starred expression here 2. 缩进错误 缩进错误是小白常见错误，现在有救啦，提示很友好：>>> def foo():... if lel:......