Question

I ve been trying to nut out an issue when looping in python 3. When returning from sub routine the "line" variable has not incremented.

How do I get the script to return the latest readline from the subsroutine?

简称

def getData(line):
      #print(line)
      #while line in sTSDP_data:
      while "/service/content/test" not in line:
            line = sTSDP_data.readline()

import os, sys

sFileTSDP = "d:/ess/redo/Test.log"
sTSDP_data = open(sFileTSDP, "r")

for line in sTSDP_data:
      if "MOBITV" in line:
            getData(line)   #call sub routine
            print(line)

I m stepping through a large file and on a certain string I need to call a sub routine to process the next 5 (or 100) lines of data. When the sub routine completes and returns to the main program, it would be better to have it continue on from the last readline in the sub routine, not the last readline in the main program.

Daan s answer did the trick.

Answer 1

如何使用返回声明?

def getData(line):
      #print(line)
      #while line in sTSDP_data:
      while "/service/content/test" not in line:
            line = sTSDP_data.readline()
      return line

import os, sys

sFileTSDP = "d:/ess/redo/Test.log"
sTSDP_data = open(sFileTSDP, "r")

for line in sTSDP_data:
      if "MOBITV" in line:
            line = getData(line)   #call sub routine
            print(line)

了解您变量的范围。您的职责范围与你的工作路线不同。

Answer 2

转让也没有参考。这意味着,如果你在一项职能中重新分配一个变量,那么它就会在另一项职能中赢得一个变数(除非有具体例外,例如<条码>:全球和<条码>非当地)。 (请注意:这是再分配的,而不是修改的。) 如果您修改一份清单,所有提及名单的条目都是“修改的”。

简略位置return line at the end of AccessData(line)

def getData(line):
      #print(line)
      #while line in sTSDP_data:
      while "/service/content/test" not in line:
            line = sTSDP_data.readline()
      return line

友情链接