Pyinstaller Jinja2 TemplateNotFound

Question

I am using pyinstaller to build my flask application, everything is working fine except I get problems with Jinja2 templates.

It gave me jinja2.ex

Answer 1

I don't believe that the issue is what is described in https://stackoverflow.com/a/35816876/2741329. I have just been able to freeze an application with Jinja2.

In my spec file I use this approach to collect all the templates:

from PyInstaller.building.build_main import Analysis, PYZ, EXE, COLLECT, BUNDLE, TOC


def collect_pkg_data(package, include_py_files=False, subdir=None):
    import os
    from PyInstaller.utils.hooks import get_package_paths, remove_prefix, PY_IGNORE_EXTENSIONS

    # Accept only strings as packages.
    if type(package) is not str:
        raise ValueError

    pkg_base, pkg_dir = get_package_paths(package)
    if subdir:
        pkg_dir = os.path.join(pkg_dir, subdir)
    # Walk through all file in the given package, looking for data files.
    data_toc = TOC()
    for dir_path, dir_names, files in os.walk(pkg_dir):
        for f in files:
            extension = os.path.splitext(f)[1]
            if include_py_files or (extension not in PY_IGNORE_EXTENSIONS):
                source_file = os.path.join(dir_path, f)
                dest_folder = remove_prefix(dir_path, os.path.dirname(pkg_base) + os.sep)
                dest_file = os.path.join(dest_folder, f)
                data_toc.append((dest_file, source_file, 'DATA'))

    return data_toc

pkg_data = collect_pkg_data('')

Then add pkg_data to the COLLECT (1-folder) or to the EXE (1-file) .spec.

In the 1-folder solution, you should be able to find all your templates in the created sub-folder.

---

Edit

This might work (assuming that you have a package (i.e., you have an __init__.py) following these suggestions: http://flask.pocoo.org/docs/0.10/patterns/packages/):

# -*- mode: python -*-

# <<< START ADDED PART    
from PyInstaller.building.build_main import Analysis, PYZ, EXE, COLLECT, BUNDLE, TOC


def collect_pkg_data(package, include_py_files=False, subdir=None):
    import os
    from PyInstaller.utils.hooks import get_package_paths, remove_prefix, PY_IGNORE_EXTENSIONS

    # Accept only strings as packages.
    if type(package) is not str:
        raise ValueError

    pkg_base, pkg_dir = get_package_paths(package)
    if subdir:
        pkg_dir = os.path.join(pkg_dir, subdir)
    # Walk through all file in the given package, looking for data files.
    data_toc = TOC()
    for dir_path, dir_names, files in os.walk(pkg_dir):
        for f in files:
            extension = os.path.splitext(f)[1]
            if include_py_files or (extension not in PY_IGNORE_EXTENSIONS):
                source_file = os.path.join(dir_path, f)
                dest_folder = remove_prefix(dir_path, os.path.dirname(pkg_base) + os.sep)
                dest_file = os.path.join(dest_folder, f)
                data_toc.append((dest_file, source_file, 'DATA'))

    return data_toc

pkg_data = collect_pkg_data('')  # <<< Put the name of your package here
# <<< END ADDED PART    

block_cipher = None

a = Analysis(['..\\CommerceApp_withPyInstaller\\run.py'],
             pathex=['D:\\PythonProjects\\CommerceAppExe'],
             binaries=None,
             datas=[],
             hiddenimports=[],
             hookspath=[],
             runtime_hooks=[],
             excludes=[],
             win_no_prefer_redirects=False,
             win_private_assemblies=False,
             cipher=block_cipher)
pyz = PYZ(a.pure, a.zipped_data,
             cipher=block_cipher)
exe = EXE(pyz,
          a.scripts,
          exclude_binaries=True,
          name='SupplyTracker',
          debug=False,
          strip=False,
          upx=True,
          console=True )
coll = COLLECT(exe,
               a.binaries,
               a.zipfiles,
               a.datas,
               pkg_data,  # <<< Add here the collected files
               strip=False,
               upx=True,
               name='SupplyTracker')