Everytime I get this error

MHS-204-26:~ corbettk$ cd /Users/corbettk/Downloads/mcp722/forge/

MHS-204-26:forge corbettk$ bash install.sh

================ Forge ModLoader Setup Start ===================

Setting up MCP

> Backing up commands.py

patching file commands.py

Commands patch applied successfully

Copying FML conf

Fixing MCP Workspace

Downloaded argo-2.25.jar successfully

Downloaded guava-12.0.1.jar successfully

Downloaded guava-12.0.1-sources.jar successfully

Downloaded asm-all-4.0.jar successfully

Downloaded asm-all-4.0-source.jar successfully

File Exists: lwjgl.jar

File Exists: lwjgl_util.jar

File Exists: jinput.jar

Downloaded windows_natives.jar successfully

Traceback (most recent call last):

  File "install.py", line 40, in <module>

    main()

  File "install.py", line 19, in main

    setup_fml(fml_dir, mcp_dir)

  File "/Users/corbettk/Downloads/mcp722/forge/fml/fml.py", line 309, in setup_fml

    pre_decompile(mcp_dir, fml_dir)

  File "/Users/corbettk/Downloads/mcp722/forge/fml/fml.py", line 139, in pre_decompile

    download_minecraft(mcp_dir, fml_dir)

  File "/Users/corbettk/Downloads/mcp722/forge/fml/fml.py", line 106, in download_minecraft

    failed = not download_native(default['base_url'], os.path.join(bin_folder, 'natives'), native) or failed

  File "/Users/corbettk/Downloads/mcp722/forge/fml/fml.py", line 71, in download_native

    with ZipFile(target) as zip:

AttributeError: ZipFile instance has no attribute '__exit__'

 

 

 

I have a clean jar for everything and a new mcp/forge tried fresh installing 3 times now, I can't figure out whats going wrong. I have been able to do this easily for the past 4 versions without error until now

Make sure you're using python 2.6