Nested for loop ArcPy

Question

I have multiple GDBs from an earlier process. Each GDB contains a single feature class (FC).

I want to copy (FeatureClassToFeatureClass) each FC into a "Main" GDB for later processing in a single place.

I thought nesting a for loop like below would work. It runs, but doesn't produce a result or an error, so it's unclear why it's not working.

I am using Python 2.7.14 in a Windows Server environment, running with ArcGIS Desktop Advanced (10.6).

#Import modules
import arcpy
import os

#Target GDB
outGDB = r"E:\Jamie_Temp\Main_GDB.gdb"

#LIBRARIES
#Set workspace
arcpy.env.workspace = r"E:\Jamie_Temp\Test_Files"

#Find GDBs
inGDB = arcpy.ListWorkspaces()

for gdb in inGDB:
    inFCs = arcpy.ListFeatureClasses()
    for fc in inFCs:
        arcpy.FeatureClassToFeatureClass_conversion(fc, outGDB, fc.strip("_point"))

The idea being here that it:

1. Finds the name of all GDBs in the workspace and assigns them to inGDB
2. Loops through each GDB found in inGDB and list the FCs inside, assigning them to inFCs
3. Copy the FCs found to Main_GDB.gdb

Answer 1

You're not going to find any inFCs as you're not setting arcpy.env.workspace to a gdb before calling arcpy.ListFeatureClasses() which looks in the current workspace.

Try (untested):

#Import modules
import arcpy
import os

#Target GDB
outGDB = r"E:\Jamie_Temp\Main_GDB.gdb"

#LIBRARIES
#Set workspace
arcpy.env.workspace = ws = r"E:\Jamie_Temp\Test_Files" # note setting "ws" var here

#Find GDBs
inGDB = arcpy.ListWorkspaces()

for gdb in inGDB:
    arcpy.env.workspace = os.path.join(ws, gdb)
    # Or if gdb is a full path
    # arcpy.env.workspace = gdb
    

    inFCs = arcpy.ListFeatureClasses()
    for fc in inFCs:
        arcpy.FeatureClassToFeatureClass_conversion(fc, outGDB, fc.strip("_point"))