Virtualenv: TclError Can't find a usable init.tcl

Question

the issue: running Python's matplotib from a Windows virtual environment as reported & discussed Github ticket 93 and a relevant suggested fix here.

Code (myp.py):

     import matplotlib.pyplot as pl
     import Tkinter as tk
     # insert code to read/load mydata
     pl.plot(mydata['foo'],mydata['bar'],'*')

Tcl Error:

 _tkinter.TclError: Can't find a usable init.tcl in the following directories: 
C:/Python27/lib/tcl8.5 C:/Users/Remi/MyVirtEnv/lib/tcl8.5....(ect)

Fix attempt 1: as suggested in ticket above, I added the following env. variables to path in batch file activate.bat located in C:/Users/Remi/MyVirtEnv/Scripts/:

set "TCL_LIBRARY=C:\Python27\tcl\tcl8.5"
set "TK_LIBRARY=C:\Python27\tcl\tk8.5"

Not resolved this way. Potentially relevant info: using PyCharm IDE with the following configuration:

Environment variables: PYTHONUNBUFFERED=1
Python interpreter: python 2.7.10 virtualenv at C:\Users\Remi\MyVirtEnv
"buttons checked": Add content roots and Add source roots to PYTHONPATH

Any help I could get would be much appreciated.

Answer 1

IDLE was not launching from virtual environment.

After adding the following env. variables to path in batch file activate.bat located in ex: C:/Users/Remi/MyVirtEnv/Scripts/:

set "TCL_LIBRARY=C:\Python27\tcl\tcl8.5" set "TK_LIBRARY=C:\Python27\tcl\tk8.5"

Able to lunch IDLE in Virtual environment.

Make sure the path is proper "C:\Python27\tcl\tcl8.5"