Python3.6 Anaconda环境安装basemap遇UnsatisfiableError问题咨询

安全阿岳

2026-5-27

Why Conda Offers Python 2.7-only Basemap for Your Python 3.6 Environment & How to Fix It

First, let's break down why you're hitting this conflict:
The basemap package in Conda's default defaults channel is an older, unupdated version that only supports Python 2.7. Basemap has been in maintenance mode for years (no new features, just critical bug fixes), so its official Conda package never got updated to work with newer Python versions like 3.6. When you run conda install basemap without specifying an alternate channel, Conda tries to pull this outdated, Python 2.7-only build into your Python 3.6 environment—this naturally clashes with Python 3.x-native packages like zict, triggering the UnsatisfiableError.

Here are the most reliable fixes to get Basemap running with your Python 3.6 setup:

1. Install Basemap from the Conda-Forge Channel

The community-run conda-forge channel hosts updated Basemap builds that fully support Python 3.x. Run this command to install it:

conda install -c conda-forge basemap

Conda-forge is usually more up-to-date than the default channel for packages that aren't actively maintained upstream, so this should resolve the dependency conflict right away.

2. Create an Isolated Conda Environment (If Conflicts Persist)

If your existing environment has conflicting packages you don't want to modify, set up a dedicated environment for Basemap:

Create the environment:
```
conda create -n basemap_env python=3.6
```
Activate it:
```
conda activate basemap_env
```
Install Basemap from conda-forge:
```
conda install -c conda-forge basemap
```

This keeps Basemap and its dependencies separate from your main environment, eliminating cross-package clashes.

3. Switch to Cartopy (A Modern, Supported Alternative)

Since Basemap is no longer actively developed, Cartopy is the official recommended replacement. It's built for Python 3, has better support for modern mapping features, and is regularly maintained. Install it with: