PukiWiki

• 追加された行はこの色です。
• 削除された行はこの色です。
• 例外 へ行く。
• 例外 の差分を削除

*例外 [#y2a0d2ee]
**C言語 [#b7846bda]
なし
**Perl [#ofe8c982]


**Python [#g5ed9a4a]
 >>> while True:
 ...     try:
 ...             x = int(raw_input("Please enter a number: "))
 ...             break
 ...     except ValueError:
 ...             print "Oops!  That was no valid number.  Try again..."
 ...
 Please enter a number: fkpe
 Oops!  That was no valid number.  Try again...
 Please enter a number: foj
 Oops!  That was no valid number.  Try again...
 Please enter a number: afeafeaf
 Oops!  That was no valid number.  Try again...
 Please enter a number: 444444
 >>> x
 444444
 >>>

 import sys
 
 try:
     f = open('myfile.txt')
     s = f.readline()
     i = int(s.strip())
 except IOError as (errno, strerror):
     print "I/O error({0}): {1}".format(errno, strerror)
 except ValueError:
     print "Could not convert data to an integer."
 except:
     print "Unexpected error:", sys.exc_info()[0]
     raise

例外を送出
 >>> raise NameError, 'HiThere'
 Traceback (most recent call last):
   File "<stdin>", line 1, in ?
 NameError: HiThere
**Ruby [#neba45ba]