invalid-escape-sequence (W605)

Derived from the pycodestyle linter.

Fix is always available.

What it does

Checks for invalid escape sequences.

Why is this bad?

Invalid escape sequences are deprecated in Python 3.6.

Example

regex = "\.png$"

Use instead:

regex = r"\.png$"

Or, if the string already contains a valid escape sequence:

value = "new line\nand invalid escape \_ here"

Use instead:

value = "new line\nand invalid escape \\_ here"

References

• Python documentation: String and Bytes literals