In the embedded Terminal (Alt+F12), type one of the following commands:
npm install --global flow-binto install Flow globally.
npm install --save-dev flow-binto install Flow as a development dependency.
Configuring Flow in PyCharm
// @flow comment on top.
To change the language level to Flow
In the Flow package or executable field, specify the path to the node_modules\flow-bin node_modules/flow-bin package or the Flow binary executable file. To use node_modules\.bin\flownode_modules/ .bin/flow make sure the path to Node.js is added to the
In the Use Flow server for: area, specify the basis for coding assistance by selecting or clearing the following checkboxes:
Type checking: When this checkbox is selected, syntax and error highlighting is provided based on the data received from the Flow server. When the checkbox is cleared, only the basic internal PyCharm highlighting is available.
Navigation, code completion, and type hinting: When this checkbox is selected, suggestion lists for reference resolution and code completiong contain both suggestions retrieved from integration with Flow and suggestions calculated by PyCharm. When the checkbox is cleared, references are resolved through PyCharm calculation only.
Keep the Save all modified files automatically checkbox selected to ensure that Flow is applied continuously because Flow checks the current files only after all the other modified files are saved.
To generate a .flowconfig configuration file in your project
In the embedded Terminal (Alt+F12), type:
To enable Flow in a file
// @flowcomment at the top of it: just type
flow, press Tab, and PyCharm will expand it into