cheat sheets.

Cheat Sheet Title: [ no_spaces_alphanumeric_only ]

Cheat Sheet:
Mode | Meaning -----+-------------------------------------------------------- "r" | Read-only, starts at beginning of file (default mode). -----+-------------------------------------------------------- "r+" | Read-write, starts at beginning of file. -----+-------------------------------------------------------- "w" | Write-only, truncates existing file | to zero length or creates a new file for writing. -----+-------------------------------------------------------- "w+" | Read-write, truncates existing file to zero length | or creates a new file for reading and writing. -----+-------------------------------------------------------- "a" | Write-only, starts at end of file if file exists, | otherwise creates a new file for writing. -----+-------------------------------------------------------- "a+" | Read-write, starts at end of file if file exists, | otherwise creates a new file for reading and | writing. -----+-------------------------------------------------------- "b" | (DOS/Windows only) Binary file mode (may appear with | any of the key letters listed above).

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