Restart the loop if match file name doesn't exist

Question

I have the following code and for some reason I can not go back and check for next FC name. This code work great before I added if "os.path.exists()" and if, all files exist in both folders. Please point out what is the problem. Thanks!

import arcpy
from arcpy import env
import os
arcpy.env.overwriteOutput = True
Match_FC=arcpy.GetParameterAsText(0)
Matched=Match_FC[-10:-1]
arcpy.AddMessage
env.workspace =arcpy.GetParameterAsText(1)
output=arcpy.GetParameterAsText(2)
fcList = arcpy.ListFeatureClasses()
for fc in fcList:
 if os.path.exists(fc==Matched):
    if fc[-10:-1]==Matched:
      arcpy.MakeFeatureLayer_management(fc, output,'','','')
 pass

What do you intend `fc==Matched` to do in your call to `exists`? — timgeb, Apr 13 '16 at 19:01

sashadereh · Answer 1 · 2016-04-13T19:31:48.227

1

os.path.exists() takes path on the file system and check if it exists, and you feed it with bool value.

For example: os.path.exists('/path/to/my/file') returns True if file exists.

Edit:

I suppose you would like to do this:

for fc in fcList:
    if fc == Matched:
        # do sth if matched
    else:
        # do sth if not matched. If you don't need else branch just delete it, without pass

edited Apr 13 '16 at 19:31

answered Apr 13 '16 at 19:04

sashadereh

223
1
15

Can I use if "fc<>Matched: then "Pass" inside loop. Thx – Koush Apr 13 '16 at 19:11
I'm sorry, I do not understand you. What is <>? `pass` is useful here. – sashadereh Apr 13 '16 at 19:23
which I am trying to say if is not equal to. – Koush Apr 13 '16 at 19:24

score 0 · Answer 2 · answered Apr 13 '16 at 19:01

0

The code says os.path.exists(fc==Matched) - notice the ==. The expression fc==Matched can be either True or False, so you're checking whether True or False exist as paths.

They probably don't, which is why you never get inside the if.

answered Apr 13 '16 at 19:01

zmbq

38,013
14
101
171

Restart the loop if match file name doesn't exist

2 Answers2

Edit: