问不能通过apt安装任何东西。没有名为“烧瓶”的模块

EN

Setting up pgadmin4-apache2 (4.23-1.pgdg18.04+1) ...
Traceback (most recent call last):
  File "setup.py", line 18, in <module>
    from pgadmin.model import db, User, Version, ServerGroup, Server, \
  File "/usr/share/pgadmin4/web/pgadmin/__init__.py", line 19, in <module>
    from flask import Flask, abort, request, current_app, session, url_for
ModuleNotFoundError: No module named 'flask'
dpkg: error processing package pgadmin4-apache2 (--configure):
 installed pgadmin4-apache2 package post-installation script subprocess returned error exit status 1
Errors were encountered while processing:
 pgadmin4-apache2
E: Sub-process /usr/bin/dpkg returned an error code (1)

$ which flask
/home/anna/.local/bin/flask
$ whereis flask
flask: /usr/bin/flask /usr/local/bin/flask /home/anna/.local/bin/flask
$ python -m flask --version
Python 2.7.17
Flask 1.1.2
Werkzeug 1.0.1

$ python3 -m flask --version
/usr/local/bin/python3: No module named flask

$ pip3 install flask
Defaulting to user installation because normal site-packages is not writeable
Requirement already satisfied: flask in /home/anna/.local/lib/python3.6/site-packages (1.1.2)
Requirement already satisfied: click>=5.1 in /home/anna/.local/lib/python3.6/site-packages (from flask) (7.1.2)
Requirement already satisfied: itsdangerous>=0.24 in /home/anna/.local/lib/python3.6/site-packages (from flask) (1.1.0)
Requirement already satisfied: Jinja2>=2.10.1 in /home/anna/.local/lib/python3.6/site-packages (from flask) (2.11.2)
Requirement already satisfied: Werkzeug>=0.15 in /home/anna/.local/lib/python3.6/site-packages (from flask) (1.0.1)
Requirement already satisfied: MarkupSafe>=0.23 in /home/anna/.local/lib/python3.6/site-packages (from Jinja2>=2.10.1->flask) (1.1.1)