python FileError

Posted 2020-08-19

  1 >>> ls1=["nihia"]
  2 >>> ls1
  3 [‘nihia‘]
  4 >>> ls1.pop()
  5 ‘nihia‘
  6 >>> ls1.append("sssss")
  7 >>> ls1
  8 [‘sssss‘]
  9 >>> assert len(ls1)>0
 10 >>> ls1.pop()
 11 ‘sssss‘
 12 >>> assert len(ls1)>0
 13 
 14 Traceback (most recent call last):
 15   File "<pyshell#38>", line 1, in <module>
 16     assert len(ls1)>0
 17 AssertionError
 18 >>> 
 19 >>> ls1.fishc
 20 
 21 Traceback (most recent call last):
 22   File "<pyshell#40>", line 1, in <module>
 23     ls1.fishc
 24 AttributeError: ‘list‘ object has no attribute ‘fishc‘
 25 >>> 
 26 >>> ms1[3]
 27 
 28 Traceback (most recent call last):
 29   File "<pyshell#42>", line 1, in <module>
 30     ms1[3]
 31 NameError: name ‘ms1‘ is not defined
 32 >>> ls1[3]
 33 
 34 Traceback (most recent call last):
 35   File "<pyshell#43>", line 1, in <module>
 36     ls1[3]
 37 IndexError: list index out of range
 38 >>> 
 39 >>> dict1={‘one‘:1 ,‘two‘:2}
 40 >>> dict1[‘one‘]
 41 1
 42 >>> dict1[‘four‘]
 43 
 44 Traceback (most recent call last):
 45   File "<pyshell#47>", line 1, in <module>
 46     dict1[‘four‘]
 47 KeyError: ‘four‘
 48 >>> dixt1.get(‘four‘)
 49 
 50 Traceback (most recent call last):
 51   File "<pyshell#48>", line 1, in <module>
 52     dixt1.get(‘four‘)
 53 NameError: name ‘dixt1‘ is not defined
 54 >>> dict1.get(‘four‘)
 55 >>> dict1.get(‘two‘)
 56 2
 57 >>> 1+‘1‘
 58 
 59 Traceback (most recent call last):
 60   File "<pyshell#51>", line 1, in <module>
 61     1+‘1‘
 62 TypeError: unsupported operand type(s) for +: ‘int‘ and ‘str‘
 63 >>> 5/0
 64 
 65 Traceback (most recent call last):
 66   File "<pyshell#52>", line 1, in <module>
 67     5/0
 68 ZeroDivisionError: integer division or modulo by zero
 69 >>> 
 70 >>> 
 71 >>> 
 72 >>> 
 73 >>> ================================ RESTART ================================
 74 >>> 
 75 
 76 Traceback (most recent call last):
 77   File "/tmp/guest-WX48w4/文档/py1.py", line 2, in <module>
 78     file_name=open(‘myname‘)
 79 IOError: [Errno 2] No such file or directory: ‘myname‘
 80 >>> ================================ RESTART ================================
 81 >>> 
 82 
 83 Traceback (most recent call last):
 84   File "/tmp/guest-WX48w4/文档/py1.py", line 2, in <module>
 85     file_name=open(‘myname.txt‘)
 86 IOError: [Errno 2] No such file or directory: ‘myname.txt‘
 87 >>> ================================ RESTART ================================
 88 >>> 
 89 wrong
 90 [Errno 2] No such file or directory: ‘myname.txt‘
 91 >>> ================================ RESTART ================================
 92 >>> 
 93 wrong
 94 [Errno 2] No such file or directory: ‘myname.txt‘
 95 >>> ================================ RESTART ================================
 96 >>> 
 97 
 98 Traceback (most recent call last):
 99   File "/tmp/guest-WX48w4/文档/py1.py", line 2, in <module>
100     name=a+‘1‘
101 NameError: name ‘a‘ is not defined
102 >>> ================================ RESTART ================================
103 >>> 
104 wrong
105 unsupported operand type(s) for +: ‘int‘ and ‘str‘
106 >>> ================================ RESTART ================================
107 >>> 
108 
109 Traceback (most recent call last):
110   File "/tmp/guest-WX48w4/文档/py1.py", line 2, in <module>
111     int (‘abc‘)
112 ValueError: invalid literal for int() with base 10: ‘abc‘
113 >>> ================================ RESTART ================================
114 >>> 
115 
116 Traceback (most recent call last):
117   File "/tmp/guest-WX48w4/文档/py1.py", line 5, in <module>
118     print (file_name.read())
119 NameError: name ‘file_name‘ is not defined
120 >>> 1/0
121 
122 Traceback (most recent call last):
123   File "<pyshell#57>", line 1, in <module>
124     1/0
125 ZeroDivisionError: integer division or modulo by zero
126 >>> raise 1/0
127 
128 Traceback (most recent call last):
129   File "<pyshell#58>", line 1, in <module>
130     raise 1/0
131 ZeroDivisionError: integer division or modulo by zero
132 >>> 

 1 try:
 2     int (‘123‘)
 3     #name=1+‘1‘
 4     #file_name=open(‘myname.txt‘)
 5     print (file_name.read())
 6     file_name.close()
 7 except IOError as reason:  #eg1
 8     print (‘wrong\n‘+str(reason))
 9 except TypeError as reason:
10     print (‘wrong\n‘+str(reason))
11 except:     #eg2
12     print (‘wrong\n‘+str(reason))
13 except (TypeError,IOError):     #eg3
14     print (‘wrong\n‘+str(reason))
15 finally:    #keep away from not closing the  file
16     file_name.close()
17 
18