找不到满足要求的版本 X

ERROR: Could not find a version that satisfies the requirement <package-name> (from versions: )
ERROR: No matching distribution found for <package-name>

# 👇️ in a virtual environment or using Python 2
pip install -r requirements.txt

# 👇️ if you use Python 3 outside a virtual environment
pip3 install -r requirements.txt

# 👇️ if you don't have pip in your PATH environment variable
python -m pip install -r requirements.txt

# 👇️ for python 3 (could also be pip3.10 depending on your version)
python3 -m pip install -r requirements.txt

# 👇️ if you have pip already installed
pip install --upgrade pip

# 👇️ if your pip is aliased as pip3 (Python 3)
pip3 install --upgrade pip

# 👇️ if you don't have pip in your PATH environment variable
python -m pip install --upgrade pip

# 👇️ if you don't have pip in your PATH environment variable
python3 -m pip install --upgrade pip

# 👇️ if you have easy_install
easy_install --upgrade pip

# 👇️ if you get a permissions error
sudo easy_install --upgrade pip

# 👇️ if you get a permissions error when upgrading pip
pip install --upgrade pip --user

# 👇️ upgrade pip scoped to the current user (if you get permissions error)
python -m pip install --user --upgrade pip
python3 -m pip install --user --upgrade pip

# 👇️ Installing directly from get-pip.py (MacOS and Linux)
curl https://bootstrap.pypa.io/get-pip.py | python

# 👇️ if you get permissions issues
curl https://bootstrap.pypa.io/get-pip.py | sudo python

# 👇️ alternative for Ubuntu/Debian
sudo apt-get update && apt-get upgrade python-pip

# 👇️ alternative for Red Hat / CentOS / Fedora
sudo yum install epel-release
sudo yum install python-pip
sudo yum update python-pip

pip install --upgrade setuptools

pip3 install --upgrade setuptools

python3 -m pip install --upgrade setuptools

pip --version
pip3 --version

python --version

# 👇️ if you don't have pip in your PATH environment variable
python -m pip install <package-name>

# 👇️ for Python 3 outside of a virtual environment
python3 -m pip install <package-name>

# 👇️ on Windows
py -m pip install <package-name>

pip3 install <package-name>

pip install <package-name> --user

pip3 install <package-name> --user

python3 -m pip install <package-name> --user

sudo pip install <package-name>

sudo pip3 install <package-name>

sudo python3 -m pip install <package-name>

pip install <package-name> --upgrade

pip3 install <package-name> --upgrade

python3 -m pip install <package-name> --upgrade

python3 -m pip install --pre --upgrade requests==XX.XX.XX

pip install example==

pip3 install example==

python3 -m pip install --pre --upgrade requests==2.28.1

ERROR: Could not find a version that satisfies the requirement os (from versions: none)
ERROR: No matching distribution found for os

# 👇️ directly import built-in module
import math

print(math.sqrt(25))  # 👉️ 5.0

pip freeze > requirements.txt

pip3 freeze > requirements.txt

pip install requests --pre
pip3 install requests --pre

python -m pip install requests --pre
python3 -m pip install requests --pre
py -m pip install requests --pre

# 👇️ use correct version of Python when creating VENV
python3 -m venv venv

# 👇️ activate on Unix or MacOS
source venv/bin/activate

# 👇️ activate on Windows (cmd.exe)
venv\Scripts\activate.bat

# 👇️ activate on Windows (PowerShell)
venv\Scripts\Activate.ps1

# 👇️ Upgrade pip
pip install --upgrade pip

# 👇️ install <package-name> in virtual environment
pip install <package-name>

pip install <package-name> -vvv

pip3 install <package-name> -vvv

python -m pip install <package-name> -vvv

ERROR: Could not find a version that satisfies the requirement pandas (from versions: none)
ERROR: No matching distribution found for pandas

python --version

python3 --version

# 👇️ in a virtual environment or using Python 2
pip install pandas

# 👇️ for python 3 (could also be pip3.10 depending on your version)
pip3 install pandas

# 👇️ if you get permissions error
sudo pip3 install pandas

# 👇️ if you don't have pip in your PATH environment variable
python -m pip install pandas

# 👇️ for python 3 (could also be pip3.10 depending on your version)
python3 -m pip install pandas

# 👇️ for Anaconda
conda install -c anaconda pandas

import pandas as pd

print(pd.__version__)

# 👇️ if you have pip already installed
pip install --upgrade pip

# 👇️ if your pip is aliased as pip3 (Python 3)
pip3 install --upgrade pip

ERROR: Could not find a version that satisfies the requirement numpy (from versions: )
ERROR: No matching distribution found for numpy

python --version

python3 --version

# 👇️ in a virtual environment or using Python 2
pip install numpy

# 👇️ for python 3 (could also be pip3.10 depending on your version)
pip3 install numpy

# 👇️ if you get permissions error
sudo pip3 install numpy

# 👇️ if you don't have pip in your PATH environment variable
python -m pip install numpy

# 👇️ for python 3 (could also be pip3.10 depending on your version)
python3 -m pip install numpy

# 👇️ for Anaconda
conda install -c anaconda numpy

import numpy as np

a = np.arange(6)

a2 = a[np.newaxis, :]

print(a2.shape)

# 👇️ if you have pip already installed
pip install --upgrade pip

# 👇️ if your pip is aliased as pip3 (Python 3)
pip3 install --upgrade pip

ERROR: Could not find a version that satisfies the requirement yaml (from versions: none)
ERROR: No matching distribution found for yaml

# 👇️ in a virtual environment or using Python 2
pip install pyyaml

# 👇️ for python 3 (could also be pip3.10 depending on your version)
pip3 install pyyaml

# 👇️ for Anaconda
conda install -c conda-forge pyyaml

import yaml

print(yaml.load("""
 - bobby
 - hadz
 - .
 - com
 """, Loader=yaml.Loader)
      )

# 👇️ if you have pip already installed
pip install --upgrade pip

# 👇️ if your pip is aliased as pip3 (Python 3)
pip3 install --upgrade pip

python --version

python3 --version

ERROR: Could not find a version that satisfies the requirement tkinter (from versions: none)
ERROR: No matching distribution found for tkinter

# 👇️ === UBUNTU / DEBIAN ===
sudo apt-get install python3-tk

# 🚨 Make sure to specify correct Python version.
# For example, my Python version is 3.10, so I would install as
sudo apt-get install python3.10-tk

# 👇️ === MacOS ===
brew install python-tk@3.10

# 🚨 Make sure to specify correct Python version.
# For example, if you run Python v3.9 run adjust command to
brew install python-tk@3.9

# 👇️ === Fedora ===
sudo dnf install python3-tkinter

# 👇️ === CentOS ===
sudo yum install python3-tkinter

import tkinter as tk

from tkinter import ttk

root = tk.Tk()
frm = ttk.Frame(root, padding=10)
frm.grid()

ttk.Label(frm, text="Hello World!").grid(column=0, row=0)
ttk.Button(frm, text="Quit", command=root.destroy).grid(column=1, row=0)

root.mainloop()

python --version

python3 example_file.py

python --version

python3 --version

# 👇️ if you have pip already installed
pip install --upgrade pip

# 👇️ if your pip is aliased as pip3 (Python 3)
pip3 install --upgrade pip

pip install virtualenv

# 👇️ for python 3 (could also be pip3.10 depending on your version)
pip3 install virtualenv

# 👇️ if you get permissions error
sudo pip3 install virtualenv

# 👇️ if you don't have pip in your PATH environment variable
python -m pip install virtualenv

# 👇️ for python 3 (could also be pip3.10 depending on your version)
python3 -m pip install virtualenv

# 👇️ for Anaconda
conda install -c anaconda virtualenv

ERROR: Could not find a version that satisfies the requirement django (from versions: )
ERROR: No matching distribution found for django

python --version

python3 --version

# 👇️ if you have pip already installed
pip install --upgrade pip

# 👇️ if your pip is aliased as pip3 (Python 3)
pip3 install --upgrade pip

# 👇️ in a virtual environment or using Python 2
pip install Django

# 👇️ for python 3 (could also be pip3.10 depending on your version)
pip3 install Django

# 👇️ if you get permissions error
sudo pip3 install Django

# 👇️ if you don't have pip in your PATH environment variable
python -m pip install Django

# 👇️ for python 3 (could also be pip3.10 depending on your version)
python3 -m pip install Django

# 👇️ for Anaconda
conda install -c anaconda django