无法将目标WSGI脚本作为Python模块加载：没有名为'；pytz'；

这个错误似乎很容易解决，对吗？我试过做pip3安装pytz。但它似乎仍然认为它不在那里。有什么想法吗

作为背景，我遵循这本指南

这是我的error.log：

[Tue Nov 05 16:36:26.413502 2019] [wsgi:error] [pid 23202:tid 140594089387776]   mod_wsgi (pid=23202): Target WSGI script '/build/CommsApp/CommsApp/wsgi.py' cannot be loaded as Python module.
[Tue Nov 05 16:36:26.413537 2019] [wsgi:error] [pid 23202:tid 140594089387776]   mod_wsgi (pid=23202): Exception occurred processing WSGI script '/build/CommsApp/CommsApp/wsgi.py'.
[Tue Nov 05 16:36:26.413732 2019] [wsgi:error] [pid 23202:tid 140594089387776]   Traceback (most recent call last):
[Tue Nov 05 16:36:26.413800 2019] [wsgi:error] [pid 23202:tid 140594089387776]     File "/build/CommsApp/CommsApp/wsgi.py", line 12, in <module>
[Tue Nov 05 16:36:26.413805 2019] [wsgi:error] [pid 23202:tid 140594089387776]       from django.core.wsgi import get_wsgi_application
[Tue Nov 05 16:36:26.413811 2019] [wsgi:error] [pid 23202:tid 140594089387776]     File "/build/django/django/core/wsgi.py", line 2, in <module>
[Tue Nov 05 16:36:26.413815 2019] [wsgi:error] [pid 23202:tid 140594089387776]       from django.core.handlers.wsgi import WSGIHandler
[Tue Nov 05 16:36:26.413820 2019] [wsgi:error] [pid 23202:tid 140594089387776]     File "/build/django/django/core/handlers/wsgi.py", line 8, in <module>
[Tue Nov 05 16:36:26.413824 2019] [wsgi:error] [pid 23202:tid 140594089387776]       from django.core.handlers import base
[Tue Nov 05 16:36:26.413830 2019] [wsgi:error] [pid 23202:tid 140594089387776]     File "/build/django/django/core/handlers/base.py", line 8, in <module>
[Tue Nov 05 16:36:26.413833 2019] [wsgi:error] [pid 23202:tid 140594089387776]       from django.urls import get_resolver, set_urlconf
[Tue Nov 05 16:36:26.413839 2019] [wsgi:error] [pid 23202:tid 140594089387776]     File "/build/django/django/urls/__init__.py", line 1, in <module>
[Tue Nov 05 16:36:26.413842 2019] [wsgi:error] [pid 23202:tid 140594089387776]       from .base import (
[Tue Nov 05 16:36:26.413848 2019] [wsgi:error] [pid 23202:tid 140594089387776]     File "/build/django/django/urls/base.py", line 8, in <module>
[Tue Nov 05 16:36:26.413851 2019] [wsgi:error] [pid 23202:tid 140594089387776]       from .exceptions import NoReverseMatch, Resolver404
[Tue Nov 05 16:36:26.413857 2019] [wsgi:error] [pid 23202:tid 140594089387776]     File "/build/django/django/urls/exceptions.py", line 1, in <module>
[Tue Nov 05 16:36:26.413861 2019] [wsgi:error] [pid 23202:tid 140594089387776]       from django.http import Http404
[Tue Nov 05 16:36:26.413866 2019] [wsgi:error] [pid 23202:tid 140594089387776]     File "/build/django/django/http/__init__.py", line 5, in <module>
[Tue Nov 05 16:36:26.413869 2019] [wsgi:error] [pid 23202:tid 140594089387776]       from django.http.response import (
[Tue Nov 05 16:36:26.413884 2019] [wsgi:error] [pid 23202:tid 140594089387776]     File "/build/django/django/http/response.py", line 15, in <module>
[Tue Nov 05 16:36:26.413889 2019] [wsgi:error] [pid 23202:tid 140594089387776]       from django.core.serializers.json import DjangoJSONEncoder
[Tue Nov 05 16:36:26.413894 2019] [wsgi:error] [pid 23202:tid 140594089387776]     File "/build/django/django/core/serializers/__init__.py", line 23, in <module>
[Tue Nov 05 16:36:26.413898 2019] [wsgi:error] [pid 23202:tid 140594089387776]       from django.core.serializers.base import SerializerDoesNotExist
[Tue Nov 05 16:36:26.413903 2019] [wsgi:error] [pid 23202:tid 140594089387776]     File "/build/django/django/core/serializers/base.py", line 7, in <module>
[Tue Nov 05 16:36:26.413907 2019] [wsgi:error] [pid 23202:tid 140594089387776]       from django.db import models
[Tue Nov 05 16:36:26.413912 2019] [wsgi:error] [pid 23202:tid 140594089387776]     File "/build/django/django/db/models/__init__.py", line 3, in <module>
[Tue Nov 05 16:36:26.413916 2019] [wsgi:error] [pid 23202:tid 140594089387776]       from django.db.models.aggregates import *  # NOQA
[Tue Nov 05 16:36:26.413921 2019] [wsgi:error] [pid 23202:tid 140594089387776]     File "/build/django/django/db/models/aggregates.py", line 5, in <module>
[Tue Nov 05 16:36:26.413925 2019] [wsgi:error] [pid 23202:tid 140594089387776]       from django.db.models.expressions import Case, Func, Star, When
[Tue Nov 05 16:36:26.413930 2019] [wsgi:error] [pid 23202:tid 140594089387776]     File "/build/django/django/db/models/expressions.py", line 8, in <module>
[Tue Nov 05 16:36:26.413934 2019] [wsgi:error] [pid 23202:tid 140594089387776]       from django.db.models import fields
[Tue Nov 05 16:36:26.413939 2019] [wsgi:error] [pid 23202:tid 140594089387776]     File "/build/django/django/db/models/fields/__init__.py", line 11, in <module>
[Tue Nov 05 16:36:26.413942 2019] [wsgi:error] [pid 23202:tid 140594089387776]       from django import forms
[Tue Nov 05 16:36:26.413948 2019] [wsgi:error] [pid 23202:tid 140594089387776]     File "/build/django/django/forms/__init__.py", line 6, in <module>
[Tue Nov 05 16:36:26.413951 2019] [wsgi:error] [pid 23202:tid 140594089387776]       from django.forms.boundfield import *  # NOQA
[Tue Nov 05 16:36:26.413957 2019] [wsgi:error] [pid 23202:tid 140594089387776]     File "/build/django/django/forms/boundfield.py", line 3, in <module>
[Tue Nov 05 16:36:26.413960 2019] [wsgi:error] [pid 23202:tid 140594089387776]       from django.forms.utils import flatatt, pretty_name
[Tue Nov 05 16:36:26.413966 2019] [wsgi:error] [pid 23202:tid 140594089387776]     File "/build/django/django/forms/utils.py", line 6, in <module>
[Tue Nov 05 16:36:26.413969 2019] [wsgi:error] [pid 23202:tid 140594089387776]       from django.utils import timezone
[Tue Nov 05 16:36:26.413975 2019] [wsgi:error] [pid 23202:tid 140594089387776]     File "/build/django/django/utils/timezone.py", line 11, in <module>
[Tue Nov 05 16:36:26.413978 2019] [wsgi:error] [pid 23202:tid 140594089387776]       import pytz
[Tue Nov 05 16:36:26.413992 2019] [wsgi:error] [pid 23202:tid 140594089387776]   ModuleNotFoundError: No module named 'pytz'

[Tue Nov 05 16:36:26.413502 2019][wsgi:error][pid 23202:tid 140594089387776]mod_wsgi（pid=23202）：无法将目标wsgi脚本“/build/CommsApp/CommsApp/wsgi.py”作为Python模块加载。
[Tue Nov 05 16:36:26.413537 2019][wsgi:error][pid 23202:tid 140594089387776]mod_wsgi（pid=23202）：处理wsgi脚本'/build/CommsApp/CommsApp/wsgi.py'时发生异常。
[11月5日星期二16:36:26.413732 2019][wsgi:error][pid 23202:tid 140594089387776]回溯（最近一次呼叫最后一次）：
[11月5日星期二16:36:26.413800 2019][wsgi:error][pid 23202:tid 140594089387776]文件“/build/CommsApp/CommsApp/wsgi.py”，第12行，in
[11月5日星期二16:36:26.413805 2019][wsgi:error][pid 23202:tid 140594089387776]来自django.core.wsgi导入获取wsgi应用程序
[Tue Nov 05 16:36:26.413811 2019][wsgi:error][pid 23202:tid 140594089387776]文件“/build/django/django/core/wsgi.py”，第2行，在
[11月5日星期二16:36:26.413815 2019][wsgi:error][pid 23202:tid 140594089387776]来自django.core.handlers.wsgi导入WSGIHandler
[Tue Nov 05 16:36:26.413820 2019][wsgi:error][pid 23202:tid 140594089387776]文件“/build/django/django/core/handlers/wsgi.py”，第8行
[11月5日星期二16:36:26.413824 2019][wsgi:error][pid 23202:tid 140594089387776]来自django.core.handlers导入库
[11月5日星期二16:36:26.413830 2019][wsgi:error][pid 23202:tid 140594089387776]文件“/build/django/django/core/handlers/base.py”，第8行，在
[Tue Nov 05 16:36:26.413833 2019][wsgi:error][pid 23202:tid 140594089387776]来自django.url导入get_解析器，set_urlconf
[11月5日星期二16:36:26.413839 2019][wsgi:error][pid 23202:tid 140594089387776]文件“/build/django/django/urls/__init_u.py”，第1行，in
[11月5日星期二16:36:26.413842 2019][wsgi:error][pid 23202:tid 140594089387776]来自.基本导入(
[11月5日星期二16:36:26.413848 2019][wsgi:error][pid 23202:tid 140594089387776]文件“/build/django/django/url/base.py”，第8行，在
[11月5日星期二16:36:26.413851 2019][wsgi:error][pid 23202:tid 140594089387776]发件人。异常导入NoReverseMatch，解析404
[11月5日星期二16:36:26.413857 2019][wsgi:error][pid 23202:tid 140594089387776]文件“/build/django/django/url/exceptions.py”，第1行，在
[11月5日星期二16:36:26.413861 2019][wsgi:error][pid 23202:tid 140594089387776]来自django.http导入Http404
[11月5日星期二16:36:26.413866 2019][wsgi:error][pid 23202:tid 140594089387776]文件“/build/django/django/http/_init_uuuuuuu.py”，第5行，in
[11月5日星期二16:36:26.413869 2019][wsgi:error][pid 23202:tid 140594089387776]来自django.http.response import(
[11月5日星期二16:36:26.413884 2019][wsgi:error][pid 23202:tid 140594089387776]文件“/build/django/django/http/response.py”，第15行，在
[Tue Nov 05 16:36:26.413889 2019][wsgi:error][pid 23202:tid 140594089387776]来自django.core.serializers.json导入DjangoJSONEncoder
[11月5日星期二16:36:26.413894 2019][wsgi:error][pid 23202:tid 140594089387776]文件“/build/django/django/core/serializers/_uuinit_uuuuu.py”，第23行，in
[Tue Nov 05 16:36:26.413898 2019][wsgi:error][pid 23202:tid 140594089387776]来自django.core.serializers.base import SerializerDoesNotExist
[11月5日星期二16:36:26.413903 2019][wsgi:error][pid 23202:tid 140594089387776]文件“/build/django/django/core/serializers/base.py”，第7行
[11月5日星期二16:36:26.413907 2019][wsgi:error][pid 23202:tid 140594089387776]来自django.db导入模型
[11月5日星期二16:36:26.413912 2019][wsgi:error][pid 23202:tid 140594089387776]文件“/build/django/django/db/models/__init___u.py”，第3行，in
[11月5日星期二16:36:26.413916 2019][wsgi:error][pid 23202:tid 140594089387776]来自django.db.models.aggregates import*#NOQA
[11月5日星期二16:36:26.413921 2019][wsgi:error][pid 23202:tid 140594089387776]文件“/build/django/django/db/models/aggregates.py”，第5行
[Tue Nov 05 16:36:26.413925 2019][wsgi:error][pid 23202:tid 140594089387776]来自django.db.models.expressions导入案例，Func，Star，何时
[Tue Nov 05 16:36:26.413930 2019][wsgi:error][pid 23202:tid 140594089387776]文件“/build/django/django/db/models/expressions.py”，第8行
[Tue Nov 05 16:36:26.413934 2019][wsgi:error][pid 23202:tid 140594089387776]来自django.db.models导入字段
[11月5日星期二16:36:26.413939 2019][wsgi:error][pid 23202:tid 140594089387776]文件“/build/django/django/db/models/fields/__init___;.py”，第11行，in
[11月5日星期二16:36:26.413942 2019][wsgi:error][pid 23202:tid 140594089387776]来自django进口表格
[11月5日星期二16:36:26.413948 2019][wsgi:error][pid 23202:tid 140594089387776]文件“/build/django/django/forms/_init__.py”，第6行，in
[11月5日星期二16:36:26.413951 2019][wsgi:error][pid 23202:tid 140594089387776]来自django.forms.boundfield import*#NOQA
[11月5日星期二16:36:26.413957 2019][wsgi:error][pid 23202:tid 140594089387776]文件“/build/django/django/forms/boundfield.py”，第3行，在
[11月5日星期二16:36:26.413960 2019][wsgi:error][pid 23202:tid 140594089387776]来自django.forms.utils import flatatt，pretty_name
[Tue Nov 05 16:36:26.413966 2019][wsgi:error][pid 23202:tid 140594089387776]文件“/build/django/django/forms/utils.py”，第6行
[11月5日星期二16:36:26.413969 2019][wsgi:error][pid 23202:tid 140594089387776]来自django.utils导入时区
[11月5日星期二16:36:26.413975 2019][wsgi:error][pid 23202:tid 140594089387776]文件“/build/django/django/utils/timezone.py”，第11行
[11月5日星期二16:36:26.413978 2019][wsgi:error][pid 23202:tid 140594089387776]导入pytz
[11月5日星期二16:36:26.413992 2019][wsgi:错误