New theme for Python developers

Colorful theme for Python developers with no external
requirements.

themes/radek/README.md

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+# Powerline Theme
+
+A colorful theme for Python developers.
+It does not have any requirments.
+
+## Provided Information
+
+* Current username and hostname
+* Current path
+* Git repository status
+* Current Python environment (venv, Conda )
+* Current Python version
+
+## Examples
+
+```bash
+[radek@photon][~/src/nokia2/cbis] ±[master → origin ↑1 {1}✓][venv-cbis][py-3.7.5]
+→
+```

themes/radek/radek.theme.bash

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+#!/usr/bin/env bash
+
+GIT_THEME_PROMPT_DIRTY="${red}✗"
+GIT_THEME_PROMPT_CLEAN="${bold_green}✓"
+GIT_THEME_PROMPT_PREFIX="${bold_cyan}["
+GIT_THEME_PROMPT_SUFFIX="${bold_cyan}]"
+
+VIRTUALENV_THEME_PROMPT_PREFIX="${bold_green}["
+VIRTUALENV_THEME_PROMPT_SUFFIX="${bold_green}]"
+CONDAENV_THEME_PROMPT_PREFIX="${bold_green}["
+CONDAENV_THEME_PROMPT_SUFFIX="${bold_green}]"
+PYTHON_THEME_PROMPT_PREFIX="${bold_green}["
+PYTHON_THEME_PROMPT_SUFFIX="${bold_green}]"
+
+function prompt_command() {
+  PS1="\n${bold_white}[\u@\h]${bold_yellow}[\w] ${bold_cyan}$(scm_prompt_char_info)$(python_version_prompt)${green}\n→${reset_color} "
+}
+
+safe_append_prompt_command prompt_command