Flask Python应用程序在Heroku上崩溃

Question

I tried pushing my code directly to Heroku for hosting but I got so many errors. Now, what I did was host the code on Github, and then link the git repo with Heroku. Now, the Heroku app was created successfully but now it does not run as it crashes with an error code of H10 and status 503. My app.py code is;

from flask import Flask

app = Flask(__name__)


@app.route('/')
def hello():
    return "Hello World"

if __name__ == '__main__':
    app.run(debug=True)

From Heroku

Application Logs:

2017-06-07T04:06:26.163984+00:00 heroku[web.1]: State changed from starting 
to crashed
2017-06-07T04:32:14.975648+00:00 heroku[web.1]: State changed from crashed 
to starting
2017-06-07T04:32:25.466677+00:00 heroku[web.1]: Starting process with 
command `gunicorn malicha:app --log-file=-`
2017-06-07T04:32:27.733743+00:00 heroku[web.1]: Process exited with status 
127
2017-06-07T04:32:27.646433+00:00 app[web.1]: bash: gunicorn: command not 
found
2017-06-07T04:32:27.750144+00:00 heroku[web.1]: State changed from starting 
to crashed
2017-06-07T05:23:25.211376+00:00 heroku[web.1]: State changed from crashed 
to starting
2017-06-07T05:23:36.977579+00:00 heroku[web.1]: Starting process with 
command `gunicorn malicha:app --log-file=-`
2017-06-07T05:23:39.121911+00:00 app[web.1]: bash: gunicorn: command not 
found
2017-06-07T05:23:39.208060+00:00 heroku[web.1]: State changed from starting 
to crashed
2017-06-07T05:23:39.193064+00:00 heroku[web.1]: Process exited with status 207 

My requirements.txt

AppInst==2.1.5
Flask==0.12.2
Jinja2==2.9.6
MarkupSafe==1.0
Pillow==4.0.0
PyYAML==3.11
Pygments==2.1.3
Werkzeug==0.12.2
appdirs==1.4.3
apptools==4.4.0
argparse==1.4.0
attrs==15.2.0
backports-abc==0.5  
backports.shutil-get-terminal-size==1.0.0   
beautifulsoup4==4.4.1
bleach==1.5.0
boto==2.40.0
certifi==2017.4.17
chardet==3.0.3
click==6.7
colorama==0.3.9
colorthief==0.2.1
configobj==5.0.6
configparser==3.5.0
cycler==0.10.0  
decorator==4.0.9
dlib==19.4.0
docutils==0.13.1
ecdsa==0.13
encore==0.7.0
enstaller==4.8.12
entrypoints==0.2.2
enum34==1.1.6
envisage==4.6.0
esky==0.9.8  
feedparser==5.2.1
flake8==3.3.0
futures==3.0.3
gnureadline==6.3.3
gunicorn==19.7.1
hatcher==0.10.4
html5lib==0.999
humanize==0.5.1
idna==2.5
imutils==0.4.3
ipykernel==4.5.2
ipython==4.0.0
ipython-genutils==0.1.0 
ipywidgets==6.0.0
itsdangerous==0.24
jedi==0.10.2
jsonify==0.5
jsonschema==2.6.0
jupyter==1.0.0
jupyter-client==5.0.0   
jupyter-console==5.1.0  
jupyter-core==4.3.0 
keyring==10.3.3
lxml==3.8.0
matplotlib==2.0.2
mccabe==0.6.1
memory-profiler==0.43   
mistune==0.7.4
mpmath==0.19
nbconvert==5.2.1
nbformat==4.3.0
nose==1.3.7
notebook==4.4.1
numpy==1.12.1
okonomiyaki==0.16.10
olefile==0.44
opencv-python==3.2.0.7 
packaging==16.8
pandas==0.20.2
pandocfilters==1.4.1
path.py==10.3.1
pathlib2==2.2.1
pbr==3.0.1
pep8==1.7.0
pexpect==4.2.1
pickleshare==0.7.4
pip==9.0.1
plotly==2.0.9
ply==3.10
prompt-toolkit==1.0.13  
psutil==5.2.2
psycopg2==2.7.1
ptyprocess==0.5.1
pyasn1==0.2.3
pycodestyle==2.3.1
pycrypto==2.6.1
pyface==5.1.0
pyflakes==1.5.0
pyglet==1.1.4
pymongo==3.4.0
pyparsing==2.2.0
python-dateutil==2.6.0
pytz==2017.2
pyzmq==16.0.2
qtconsole==4.3.0
requests==2.17.3
rsa==3.4.2
scipy==0.19.0 
simplegeneric==0.8.1
singledispatch==3.4.0.3
six==1.10.0
stevedore==1.23.0
sympy==1.0
tabulate==0.7.7
terminado==0.6
testpath==0.3.1
tornado==4.5.1
traitlets==4.3.2
traits==4.6.0
traits-enaml==0.2.1
traitsui==5.1.0
tzlocal==1.4
urllib3==1.21.1
virtualenv==15.1.0
wcwidth==0.1.7
cmake==0.7.1

My Procfile

    web: gunicorn malicha:app --log-file=-

Build Log

the section of the build log after

 -----> Found requirements.txt, installing dependencies using pip DEPRECATION: --allow-all-external has been deprecated and will be removed in the future. Due to changes in the repository protocol, it no longer has any effect. Collecting AppInst==2.1.5 (from -r requirements.txt (line 1)) Downloading AppInst-2.1.5.tar.gz Collecting Flask==0.12.2 (from -r requirements.txt (line 2)) Downloading Flask-0.12.2-py2.py3-none-any.whl (83kB) Collecting Jinja2==2.9.6 (from -r requirements.txt (line 3)) Downloading Jinja2-2.9.6-py2.py3-none-any.whl (340kB) Collecting MarkupSafe==1.0 (from -r requirements.txt (line 4)) Downloading MarkupSafe-1.0.tar.gz Collecting Pillow==4.0.0 (from -r requirements.txt (line 5)) Downloading Pillow-4.0.0-cp27-cp27m-manylinux1_x86_64.whl (5.6MB) Collecting PyYAML==3.11 (from -r requirements.txt (line 6)) Downloading PyYAML-3.11.zip (371kB) Collecting Pygments==2.1.3 (from -r requirements.txt (line 7)) Downloading Pygments-2.1.3-py2.py3-none-any.whl (755kB) Collecting Werkzeug==0.12.2 (from -r requirements.txt (line 8)) Downloading Werkzeug-0.12.2-py2.py3-none-any.whl (312kB) Requirement already satisfied: appdirs==1.4.3 in ./.heroku/vendor/lib/python2.7/site-packages (from -r requirements.txt (line 9)) Collecting apptools==4.4.0 (from -r requirements.txt (line 10)) Downloading apptools-4.4.0.zip (490kB) Collecting argparse==1.4.0 (from -r requirements.txt (line 11)) Downloading argparse-1.4.0-py2.py3-none-any.whl Collecting attrs==15.2.0 (from -r requirements.txt (line 12)) Downloading attrs-15.2.0-py2.py3-none-any.whl Collecting backports-abc==0.5 (from -r requirements.txt (line 13)) Downloading backports_abc-0.5-py2.py3-none-any.whl Collecting backports.shutil-get-terminal-size==1.0.0 (from -r requirements.txt (line 14)) Downloading backports.shutil_get_terminal_size-1.0.0-py2.py3-none-any.whl Collecting beautifulsoup4==4.4.1 (from -r requirements.txt (line 15)) Downloading beautifulsoup4-4.4.1-py2-none-any.whl (81kB) Collecting bleach==1.5.0 (from -r requirements.txt (line 16)) Downloading bleach-1.5.0-py2.py3-none-any.whl Collecting boto==2.40.0 (from -r requirements.txt (line 17)) Downloading boto-2.40.0-py2.py3-none-any.whl (1.3MB) Collecting certifi==2017.4.17 (from -r requirements.txt (line 18)) Downloading certifi-2017.4.17-py2.py3-none-any.whl (375kB) Collecting chardet==3.0.3 (from -r requirements.txt (line 19)) Downloading chardet-3.0.3-py2.py3-none-any.whl (133kB) Collecting click==6.7 (from -r requirements.txt (line 20)) Downloading click-6.7-py2.py3-none-any.whl (71kB) Collecting colorama==0.3.9 (from -r requirements.txt (line 21)) Downloading colorama-0.3.9-py2.py3-none-any.whl Collecting colorthief==0.2.1 (from -r requirements.txt (line 22)) Downloading colorthief-0.2.1-py2.py3-none-any.whl Collecting configobj==5.0.6 (from -r requirements.txt (line 23)) Downloading configobj-5.0.6.tar.gz Collecting configparser==3.5.0 (from -r requirements.txt (line 24)) Downloading configparser-3.5.0.tar.gz Collecting cycler==0.10.0 (from -r requirements.txt (line 25)) Downloading cycler-0.10.0-py2.py3-none-any.whl Collecting decorator==4.0.9 (from -r requirements.txt (line 26)) Downloading decorator-4.0.9-py2.py3-none-any.whl Requirement already satisfied: dlib==19.4.0 in ./.heroku/vendor/lib/python2.7/site-packages (from -r requirements.txt (line 27)) Collecting docutils==0.13.1 (from -r requirements.txt (line 28)) Downloading docutils-0.13.1-py2-none-any.whl (537kB) Collecting ecdsa==0.13 (from -r requirements.txt (line 29)) Downloading ecdsa-0.13-py2.py3-none-any.whl (86kB) Collecting encore==0.7.0 (from -r requirements.txt (line 30)) Downloading encore-0.7.0.tar.gz (122kB) Collecting enstaller==4.8.12 (from -r requirements.txt (line 31)) Downloading enstaller-4.8.12.tar.gz (905kB) Complete output from command python setup.py egg_info: Traceback (most recent call last): File "<string>", line 1, in <module> File "/tmp/pip-build-PRtgXg/enstaller/setup.py", line 146, in <module> write_version_py() File "/tmp/pip-build-PRtgXg/enstaller/setup.py", line 88, in write_version_py raise ImportError("Unable to import git_revision. Try removing " ImportError: Unable to import git_revision. Try removing enstaller/_version.py and the build directory before building. ---------------------------------------- Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-PRtgXg/enstaller/ -----> Creating environment variables. -----> Buildpack installed. -----> Discovering process types Procfile declares types -> web -----> Compressing... Done: 176.8M -----> Launching... Released v26 https://malicha.herokuapp.com/ deployed to Heroku 

error while building

on inspecting the build log, I discovered an error while building :  Downloading enstaller-4.8.12.tar.gz (905kB)
Complete output from command python setup.py egg_info:
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/tmp/pip-build-PRtgXg/enstaller/setup.py", line 146, in <module>
    write_version_py()
  File "/tmp/pip-build-PRtgXg/enstaller/setup.py", line 88, in write_version_py
    raise ImportError("Unable to import git_revision. Try removing "
ImportError: Unable to import git_revision. Try removing enstaller/_version.py and the build directory before building.

----------------------------------------

Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-PRtgXg/enstaller/

Answer 1

I solved the problem by simply editing my Procfile from

web: gunicorn app:app --log-file=-

to

web: gunicorn src.app:app --log-file=-