2to3: add page (#5015)

pages/common/2to3.md

@@ -0,0 +1,28 @@
+# 2to3
+
+> Automated Python 2 to 3 code translation.
+> More information: <https://docs.python.org/3/library/2to3.html>.
+
+- Display changes that would be performed:
+
+`2to3 {{path/to/file.py}}`
+
+- Convert a Python 2 file to Python 3:
+
+`2to3 --write {{path/to/file.py}}`
+
+- Convert a specified Python 2 feature to Python 3:
+
+`2to3 --write {{file.py}} --fix={{raw_input}} --fix={{print}}`
+
+- Convert all features except *raw_input* the specified ones to Python 3:
+
+`2to3 --nofix={{raw_input}} --fix={{print}} example.py`
+
+- Display the list of available transformation features:
+
+`2to3 --list-fixes`
+
+- Convert an entire directory:
+
+`2to3 --output-dir={{path/to/code_python3_version}} --write-unchanged-files --nobackups {{path/to/code_python2_version}}`