Python异常控制/流问题

我一直在使用Python并遇到了一些必须经常发生的事情.
我有五个陈述都属于提高的常见陷阱
FooException和BarException.我想运行它们,防范它们
这些异常但即使在之后引发异常也会继续处理
一些处理完成.现在,我可以这样做：

try:
    foo()
except (FooException, BarException):
    pass
try:
    bar()
except (FooException, BarException):
    pass
try:
    baz()
except (FooException, BarException):
    pass
try:
    spam()
except (FooException, BarException):
    pass
try:
    eggs()
except (FooException, BarException):
    pass

但这真的很冗长,极端违反DRY.相当蛮力
明显的解决方案是这样的：

def wish_i_had_macros_for_this(statements, exceptions, gd, ld):                
    """ execute statements inside try/except handling exceptions with gd and ld
    as global dictionary and local dictionary

    statements is a list of strings to be executed as statements
    exceptions is a list of strings that resolve to Exceptions
    gd is a globals() context dictionary
    ld is a locals() context dictionary

    a list containing None or an Exception if an exception that wasn't 
    guarded against was raised during execution of the statement for each
    statement is returned
    """
    s = """ 
try:    
    $STATEMENT
except (%s):
    pass
""" % ','.join(exceptions)                                                     
    t = string.Template(s)
    code = [t.substitute({'STATEMENT': s}) for s in statements]                   
    elist = list() 
    for c in code:
        try:
            exec c in gd, ld
            elist.append(None)
        except Exception, e:
            elist.append(e)
    return elist

使用顺序如下：

>>> results = wish_i_had_macros_for_this(
                ['foo()','bar()','baz','spam()','eggs()'],
                ['FooException','BarException'],
                globals(),
                locals())
[None,None,None,SpamException,None]

有没有更好的办法？

解决方法:

那这个呢？

 #!/usr/bin/env python

 def foo():
     print "foo"

 def bar():
     print "bar"

 def baz():
     print "baz"

 for f in [foo, bar, baz]:
     try:
         f()
     except (FooException, BarException):
         pass 

标签：python,exception-handling,try-except
来源： https://codeday.me/bug/20190826/1732505.html