目录
解决问题
raise ImportError(msg) from None
ImportError: Missing optional dependency 'fastparquet'. fastparquet is required for parquet support. Use pip or conda to install fastparquet.
解决思路
提示导入错误(msg)
导入错误:缺少可选依赖项“fastparquet”。fastparquet 需要parquet支持。使用pip或conda安装fastparquet
解决方法
T1、pip本地下载
如果原先存在，可卸掉pyarrow后，重新下载即可！
pip install pyarrow-2.0.0-cp37-cp37m-win_amd64.whl
T2、pip在线下载
分别安装下边两个包
1. pip install fastparquet 2. pip install --upgrade -i https://pypi.tuna.tsinghua.edu.cn/simple pyarrow 3. pip --default-timeout=1000 install --upgrade -i https://pypi.tuna.tsinghua.edu.cn/simple fastparquet
1. (base) C:\Users\niu>conda install -i https://pypi.tuna.tsinghua.edu.cn/simple fastparquet 2. usage: conda-script.py [-h] [-V] command ... 3. conda-script.py: error: unrecognized arguments: -i 4. 5. (base) C:\Users\niuyayun>conda install fastparquet 6. Collecting package metadata (current_repodata.json): done 7. Solving environment: | 8. The environment is inconsistent, please check the package plan carefully 9. The following packages are causing the inconsistency: 10. 11. - defaults/win-64::anaconda==2020.02=py37_0 12. - defaults/win-64::bkcharts==0.2=py37_0 13. - defaults/noarch::dask==2.11.0=py_0 14. - defaults/noarch::seaborn==0.10.0=py_0 15. - defaults/win-64::statsmodels==0.11.0=py37he774522_0 16. failed with initial frozen solve. Retrying with flexible solve. 17. Solving environment: done 18. Collecting package metadata (repodata.json): done 19. Solving environment: / 20. The environment is inconsistent, please check the package plan carefully 21. The following packages are causing the inconsistency: 22. 23. - defaults/win-64::anaconda==2020.02=py37_0 24. - defaults/win-64::bkcharts==0.2=py37_0 25. - defaults/noarch::dask==2.11.0=py_0 26. - defaults/noarch::seaborn==0.10.0=py_0 27. - defaults/win-64::statsmodels==0.11.0=py37he774522_0 28. done 29. 30. ## Package Plan ## 31. 32. environment location: D:\ProgramData\Anaconda3 33. 34. added / updated specs: 35. - fastparquet 36. 37. 38. The following packages will be downloaded: 39. 40. package | build 41. ---------------------------|----------------- 42. _anaconda_depends-2020.02 | py37_0 6 KB 43. anaconda-custom | py37_1 3 KB 44. ca-certificates-2020.10.14 | 0 122 KB 45. certifi-2020.6.20 | py37_0 156 KB 46. conda-4.9.0 | py37_0 2.9 MB 47. fastparquet-0.4.1 | py37h2a96729_0 3.4 MB 48. openssl-1.1.1h | he774522_0 4.8 MB 49. pandas-1.1.3 | py37ha925a31_0 7.3 MB 50. thrift-0.11.0 | py37h6538335_0 102 KB 51. ------------------------------------------------------------ 52. Total: 18.8 MB 53. 54. The following NEW packages will be INSTALLED: 55. 56. _anaconda_depends pkgs/main/win-64::_anaconda_depends-2020.02-py37_0 57. fastparquet pkgs/main/win-64::fastparquet-0.4.1-py37h2a96729_0 58. pandas pkgs/main/win-64::pandas-1.1.3-py37ha925a31_0 59. thrift pkgs/main/win-64::thrift-0.11.0-py37h6538335_0 60. 61. The following packages will be UPDATED: 62. 63. ca-certificates 2020.1.1-0 --> 2020.10.14-0 64. certifi 2019.11.28-py37_0 --> 2020.6.20-py37_0 65. conda 4.8.2-py37_0 --> 4.9.0-py37_0 66. openssl 1.1.1d-he774522_4 --> 1.1.1h-he774522_0 67. 68. The following packages will be DOWNGRADED: 69. 70. anaconda 2020.02-py37_0 --> custom-py37_1 71. 72. 73. Proceed ([y]/n)? pip install fastparquet 74. Invalid choice: pip install fastparquet 75. Proceed ([y]/n)? 76. 77. 78. Downloading and Extracting Packages 79. _anaconda_depends-20 | 6 KB | ############################################################################ | 100% 80. conda-4.9.0 | 2.9 MB | ############################################################################ | 100% 81. pandas-1.1.3 | 7.3 MB | ################################################################################################################# | 100% 82. certifi-2020.6.20 | 156 KB | ################################################################################################################# | 100% 83. anaconda-custom | 3 KB | ################################################################################################################# | 100% 84. ca-certificates-2020 | 122 KB | ################################################################################################################# | 100% 85. thrift-0.11.0 | 102 KB | ################################################################################################################# | 100% 86. fastparquet-0.4.1 | 3.4 MB | ################################################################################################################# | 100% 87. openssl-1.1.1h | 4.8 MB | ################################################################################################################# | 100% 88. Preparing transaction: done 89. Verifying transaction: done 90. Executing transaction: done
哈哈，大功告成！
