ValueError: need more than 1 value to unpack 行与行之间缺少逗号 比如我的错误是'index'后缺少逗号
a,b,c=(1,2,3)# 正常,a=1,b=2,c=3a,b,c=range(5)# 报错,ValueError:too many values to unpack a,b,c,d,e=[1,2,3]# 报错,ValueError:need more than3values to unpack python 3.x中允许=号昨边的变量数小于=号右边表达式返回的结果的个数,但是需要有1个且只能有1个字典类型的变量来接收...
The index method can’t return a number because the substring isn’t there, so we get a value error instead: In order to avoid thisTraceback Error, we can use the keywordinto check if a substring is contained in a string. In the case of Loops, it was used for iteration, whereas in...
When true, the call requires selector to resolve to a single element. If given selector resolves to more than one element, the call throws an exception. Returns --- Union[ElementHandle, None]"""returnmapping.from_impl_nullable( self._sync( self._impl_obj.wait_for_selector( selector=sele...
a,b,c,d,e = [1,2,3] # 报错,ValueError: need more than 3 values to unpack python 3.x中允许=号昨边的变量数小于=号右边表达式返回的结果的个数,但是需要有1个且只能有1个字典类型的变量来接收多余的返回值。与python 2.x相同的是 python 3.x中=号左边的变量数也是不能多与=号右边表达式的返回...
importsysdefbar(i):ifi ==1:raiseKeyError(1)ifi ==2:raiseValueError(2)defgood(): exception =Nonetry: bar(int(sys.argv[1]))exceptKeyErrorase: exception = eprint('key error')exceptValueErrorase: exception = eprint('value error')print(exception) good() ...
StringVar() # Set it to some value. self.contents.set("this is a variable") # Tell the entry widget to watch this variable. self.entrythingy["textvariable"] = self.contents # Define a callback for when the user hits return. # It prints the current value of the variable. self.entry...
If you’re interested in learning more about timing functions, then have a look at Python Timer Functions: Three Ways to Monitor Your Code.Debugging CodeThe following @debug decorator will print a function’s arguments and its return value every time you call the function:Python...
1、数据导入和导出 1.1 数据的导入 1)一般方式导入文件 2)导入csv文件 3)导入文本文件 4)导入excel文件(后缀xlsx) 1.2 数据的导出 1)导出csv/txt文件 2)导出xlsx文件 2、值处理 A、重复值处理 2.1 用duplicated()找出重复位置 1)找出行的重复位置 2)根据列,找出重复位置 2.2 用drop_duplicates()删除重复值...
29、RuntimeError: nvrtc: error: invalid value for --gpu-architecture (-arch) 在跑强化学习训练的时候遇到的:python train.py --exptid xxx-xx-WHATEVER --device cuda:0 解决:先卸载已有torch环境,安装torch==1.13.1版本 pip uninstall torch pip uninstall torchvision pip uninstall torchaudio pip install...