Question

我经常发现自己使用了以下模式来扼制格式。

a = 3
b =  foo 
c = dict(mykey= myval )

#prints a is 3, b is foo, mykey is myval
print( a is {a}, b is {b}, mykey is {c[mykey]} .format(**vars()))

这就是说,我常常需要在当地名称空间印刷价值,以呼呼呼呼var。然而,在我看一看我的代码时,似乎总是重复<代码>.format(**vars()的模式。

我愿建立一种能够反映这一模式的职能。情况如下。

# doesn t work
def lfmt(s):
    """
    lfmt (local format) will format the string using variables
    in the caller s local namespace.
    """
    return s.format(**vars())

除非在<代码>上出现Imt名称空间时,斜体已不复存在。

我怎么能写下lf,以便把var(var)放在打电话者的名字空间中,这样,以下法典就能够发挥上述作用?

print(lfmt( a is {a}, b is {b}, mykey is {c[mykey]} ))

Answer 1

www.un.org/spanish/ga/president Note, as ,the documentation warns ,inspect 模块可能不适合生产法,因为它可能无法与所有实施“灰色”项目合作。

import inspect
def lfmt(s):
    caller = inspect.currentframe().f_back
    return s.format(**caller.f_locals)

a = 3
b =  foo 
c = dict(mykey= myval )

print(lfmt( a is {a}, b is {b}, mykey is {c[mykey]} ))
# a is 3, b is foo, mykey is myval

Answer 2

你们必须检查电话线中的变量。

这将使你开始:

import inspect
import pprint

def lfmt(s):
    for frame in inspect.getouterframes(inspect.currentframe()):
        f = frame[0]
        print pprint.pformat(f.f_locals)
    return  ??? 

if __name__ ==  __main__ :
    a = 10
    b = 20
    c = 30
    lfmt( test )

Answer 3

阁下:

import sys

def lfmt(s):
    """
    lfmt (local format) will format the string using variables
    in the caller s local namespace.
    """

    if hasattr(sys, "tracebacklimit") and sys.tracebacklimit == 0:
        raise Exception, "failfailfail"

    try:
        raise ZeroDivisionError
    except ZeroDivisionError:
        f = sys.exc_info()[2].tb_frame.f_back

    return s.format(**f.f_locals)

a = 5
somestring = "text"
print lfmt("{a} {somestring}")

这样做并不意味着你应该使用。这就是开发商所称的“主要 ha车”,通常用“第三十号指示”发出评论。

Answer 4

否每一次,你都称职?

def lfmt(s,v):
    """
    lfmt (local format) will format the string using variables
    from the dict returned by calling v()"""
    return s.format(**v())

print(lfmt( a is {a}, b is {b}, mykey is {c[mykey]} ,vars))

Answer 5

也可以使用<条码>sys而不是<条码>spect,但我不知道它是否与<条码>的不同执行有同样的问题。

import sys

def lfmt(s):
    caller = sys._getframe(1)
    return s.format(**caller.f_locals)

直至我为止:。 Python pol implementation

友情链接