Add configuration for python

.config/bpython/config

@@ -0,0 +1,8 @@
+[general]
+
+# Make `bpython` and `python` share their history
+# (Note: `$XDG_STATE_HOME` is not expanded)
+hist_file = ~/.local/state/python/history
+
+# No limit
+hist_length = 999999

.config/git/ignore

@@ -4,3 +4,11 @@
 *.orig
 *.temp
 *.tmp
+
+# Python
+__pycache__/
+*.py[cod]
+.python-version
+.venv/
+venv/
+.env

.config/pypoetry/config.toml

@@ -0,0 +1,9 @@
+[virtualenvs]
+
+create = true
+in-project = true  # .venv/ inside the project, not a central cache
+
+
+[installer]
+
+parallel = true

.config/python/startup.py

@@ -0,0 +1,54 @@
+"""Move Python's history file to "$XDG_STATE_HOME/python/history".
+
+Python 3.13+ honors the `$PYTHON_HISTORY` environment variable,
+so this file is only needed for older interpreters (e.g., via `pyenv`).
+
+`$PYTHONSTARTUP` is executed in the REPL's own namespace
+=> Everything is wrapped in a function that is deleted afterwards
+   to avoid polluting the prompt with temporary names
+"""
+
+import sys
+
+
+def _setup_history():
+    if sys.version_info >= (3, 13):
+        return  # `$PYTHON_HISTORY` handles it
+
+    try:
+        import readline  # because it is not in every build
+    except ImportError:
+        return
+
+    import atexit
+    import os
+
+    state_home = os.environ.get("XDG_STATE_HOME") or os.path.join(
+        os.path.expanduser("~"), ".local", "state"
+    )
+    history_file = os.path.join(state_home, "python", "history")
+
+    os.makedirs(os.path.dirname(history_file), exist_ok=True)
+    if os.path.isdir(history_file):
+        raise OSError(history_file + " must not be a directory")
+
+    try:
+        readline.read_history_file(history_file)
+    except OSError:  # `$PYTHON_HISTORY` is non-existent or unreadable
+        pass
+
+    readline.set_auto_history(True)
+    readline.set_history_length(999999)
+
+    def write_history():
+        try:
+            readline.write_history_file(history_file)
+        except OSError:
+            pass
+
+    atexit.register(write_history)  # Keep a reference to `write_history`
+
+
+_setup_history()
+
+del _setup_history

.config/shell/aliases

@@ -136,3 +136,31 @@ fi
 
 
 alias grep='grep --exclude-dir=.git'
+
+
+
+# Make working with Python more convenient
+
+alias py='python3'
+
+ipy() {
+    if command -v ipython >/dev/null 2>&1; then
+        ipython "$@"
+    elif command -v ipython3 >/dev/null 2>&1; then
+        ipython3 "$@"
+    else
+        echo "ipython not installed" >&2
+        return 1
+    fi
+}
+
+if _command_exists poetry; then
+    alias pr='poetry run'
+fi
+
+if _command_exists pyenv; then
+    alias pyvenvs='pyenv virtualenvs --bare --skip-aliases'
+    alias pyver='pyenv version'
+    alias pyvers='pyenv versions --skip-aliases'
+    alias pywhich='pyenv which'
+fi

.config/shell/env

@@ -49,3 +49,7 @@ unset _bat
 export BAT_CONFIG_PATH="$XDG_CONFIG_HOME/bat/config"
 export LESSHISTFILE="$XDG_STATE_HOME/less/history"
 export PSQLRC="$XDG_CONFIG_HOME/psql/psqlrc"
+export PYENV_ROOT="$XDG_DATA_HOME/pyenv"
+export PYTHONPYCACHEPREFIX="$XDG_CACHE_HOME/python"
+export PYTHONSTARTUP="$XDG_CONFIG_HOME/python/startup.py"
+export PYTHON_HISTORY="$XDG_STATE_HOME/python/history"

.profile

@@ -45,6 +45,12 @@ _prepend_to_path "$HOME/.local/bin"
 [ -f "$HOME/.config/shell/env" ] && . "$HOME/.config/shell/env"
 
 
+# Must be between sourcing ~/.config/shell/env and ~/.config/shell/aliases
+# because the first defines the `pyenv` related environment variables
+# while the second creates `pyenv` related aliases
+_prepend_to_path "$PYENV_ROOT/bin"
+
+
 [ -f "$HOME/.config/shell/aliases" ] && . "$HOME/.config/shell/aliases"
 
 
@@ -62,5 +68,20 @@ fi
 # which then also ensures that this file is sourced
 
 
+if [ -z "${PYENV_SHELL:-}" ] && _command_exists pyenv; then
+
+    eval "$(pyenv init -)" || echo "WARN: pyenv init failed" >&2
+
+    case $- in
+        *i*)
+            if [ -d "$PYENV_ROOT/plugins/pyenv-virtualenv" ]; then
+                eval "$(pyenv virtualenv-init -)" || true
+            fi
+            ;;
+    esac
+
+fi
+
+
 # When everything is loaded, show a little welcome message
 case $- in *i*) [ -f "$HOME/.config/shell/welcome" ] && . "$HOME/.config/shell/welcome";; esac