简化以下代码的最佳方法是什么？

Question

if report == True:  
    print ("\tActive parts:\t%s")%(len(pact)) # TOTAL P Part and Active
    print ("\tDiscontinued parts:\t%s")%(len(pdisc)) # TOTAL P Part and Discontinued
    print ("\tSlow-moving parts:\t%s")%(len(pslow)) # TOTAL P Part and Slow-moving
    print ("\tObsolete parts:\t%s")%(len(pobs)) # P TOTAL Part and Obsolete

我怎样才能最好地简化上述内容？我还有大约80条其他的打印语句，比如那些使代码很难使用的语句？你知道吗

Answer 1

把模板写成“常量”，然后print( template % dictionary_of_values)

澄清：

template = """\tActive parts:\t%(pactlen)d
\tDiscontinued parts:\t%(pdisclen)d
..."""
...
values = {'pactlen':len(pact), 'pdisclen':len(pdics) }
print(template % values)

Answer 2

重新考虑代码的因素，以便将各个变量存储在字典中，例如

data['pact']  = ...
data['pdisc'] = ...

甚至作为类的属性

class Data:
    pact = ...
    pdisc = ...

然后创建一个单独的字符串列表来描述每个属性，例如：

longnames = {"pact": "Active parts", "pdisc": "Discontinued parts", ... }

然后你可以这样打印它们：

if report:
    for key, name in values:
        print "\t%s\t%d" % (name, len(data[key])) # if using a dict
        print "\t%s\t%d" % (name, len(getattr(data, key))) # if using a class

Answer 3

您可以创建一个包含所有标签和值的元组列表，并执行如下循环：

if report:
    values = [
        ("Active parts:", pact),
        ("Discontinued parts:", pdisc),
        # etc...
    ]
    for label, value in values:
        print ("\t{}\t{}".format(label, len(value)))