pip3 install --upgrade prompt-toolkit==2.0.4
abc:数据分析 mac126$ pip3 install --upgrade prompt-toolkit==2.0.4 Collecting prompt-toolkit==2.0.4 Downloading https://files.pythonhosted.org/packages/91/ef/f4010d53dbd736c47e78d2226b12ab446bbe0ce66616d0b92d51d8a15fe4/prompt_toolkit-2.0.4-py3-none-any.whl (328kB) 100% |████████████████████████████████| 337kB 120kB/s Requirement already satisfied, skipping upgrade: wcwidth in /Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages (from prompt-toolkit==2.0.4) (0.1.7) Requirement already satisfied, skipping upgrade: six>=1.9.0 in /Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages (from prompt-toolkit==2.0.4) (1.11.0) py2neo 4.1.3 has requirement prompt_toolkit==1.0.15, but you'll have prompt-toolkit 2.0.4 which is incompatible. Installing collected packages: prompt-toolkit Found existing installation: prompt-toolkit 1.0.15 Uninstalling prompt-toolkit-1.0.15: Successfully uninstalled prompt-toolkit-1.0.15
问题原因： jupyter-console 5.2.0 has requirement prompt-toolkit<2.0.0,>=1.0.0, but you'll have prompt-toolkit 2.0.4 which is incompatible.