">>> print(str2)Traceback (most recent call last): File "<pyshell#2>", line 1, in <module> print(str2)NameError: name 'str2' is not defined>>> str1="Hello World!SyntaxError: EOL while scanning string literal>>> str1="Hello World!”SyntaxError: EOL while scanning string liter...
Traceback (most recent call last ): File "/Users/chenxiangan/pythonproject/demo/exmpale.py", line 5, in <module> greet ('Chad') File "/Users/chenxiangan/pythonproject/demo/exmpale.py", line 3, in greet print ('Hello, ' + someon )NameError: name 'someon' is not defined 此错误...
1Traceback (most recent call last ):2File'/Users/chenxiangan/pythonproject/demo/exmpale.py', line 3,in<module>3greet (1)4File'/Users/chenxiangan/pythonproject/demo/greetings.py', line 6,ingreet5print(greeting +','+who_to_greet (someone ))6TypeError: can only concatenate str (not'int...
Traceback (most recent call last ): File "/Users/chenxiangan/pythonproject/demo/exmpale.py", line 1, in <module> import aaa ModuleNotFoundError: No module named 'aaa' 1. 2. 3. 4. 在这个例子中可以看到,当我们使用 import 导入一个不存在的模块时,就会出现 ModuleNotFoundError 的错误,Trace...
In[7]:1+2*varTraceback(most recent call last):File"<ipython-input-9-fa55356f14f5>",line1,in<module>1+2*varNameError:name'var'is not defined 变量var在参与运算之前没有被定义,因此出现该异常提示。我们只需要在此代码前对var进行定义,方可正常执行后续代码。另外,我们在初学的时候,容易出现对变量...
虽然 Python 的 Traceback 提示信息看着挺复杂,但是里面丰富的信息,可以帮助你诊断和修复代码中引发异常的原因,以及定位到具体哪个文件的哪行代码出现的错误,所以说学会看懂 Traceback 信息是非常重要的,另外在面试的时候也经常会问到 Python 中的异常类型及其含义,那么,接下来就让我们对其进行详细理解。 什么是 Traceb...
ZeroDivisionError: division by zero>>> 4 + spam*3#spam 未定义,触发异常Traceback (most recent call last): File"<stdin>", line 1,in? NameError: name'spam'isnotdefined>>>'2'+ 2#int 不能与 str 相加,触发异常Traceback (most recent call last): ...
Hallo,Python Traceback (most recent call last): File "C:\Users\Administrator\1.py", line 17, inprint(Str1) NameError: name 'Str1' is not defined 使用 del 关键字可以删除整个字符串，删除后尝试输出字符串，将产生错误，因为字符串已删除无法打印输出。字符串中的转义字符 因为字符串包含在单...
Traceback (most recent call last ): File "/Users/chenxiangan/pythonproject/demo/exmpale.py", line 5, in <module> greet ('Chad') File "/Users/chenxiangan/pythonproject/demo/exmpale.py", line 3, in greet print ('Hello, ' + someon ) NameError: name 'someon' is not defined ...
Python 回溯的概念 Python Traceback Python中常见的回溯 AttributeError ImportError IndexError KeyError Na...