ipython default profile config with git branch

ipython_config.py

c = get_config()

# lines of code to run at IPython startup.
c.TerminalIPythonApp.exec_lines = [
        'Exit = exit',
        'import numpy as np',
        'np.set_printoptions(suppress=True)',
        'import statsmodels.api as sm',
        'import matplotlib.pyplot as plt',
        'from scipy import stats, optimize',
        'import sklearn',
        'import pandas as pd',
        'import patsy',
        """pd.set_printoptions(notebook_repr_html=False,
                        precision=4,
                        max_columns=12)""",
        """
from IPython.core.prompts import LazyEvaluate

@LazyEvaluate
def parse_git_branch():
    import subprocess
    cmd = 'ref=$(git symbolic-ref HEAD 2> /dev/null); echo \"(\"${ref#refs/heads/}\")\"'
    branch = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE).communicate()[0]
    if not branch.strip().strip("()"):
        return ""
    else:
        return branch""",
        """get_ipython().prompt_manager.lazy_evaluate_fields["parse_git_branch"] = parse_git_branch""",
        r"get_ipython().prompt_manager.in_template = '[\Y0/] {parse_git_branch}\n[\#]: '"
        ]


# Set the editor used by IPython (default to $EDITOR/vi/notepad).
c.TerminalInteractiveShell.editor = 'gvim -f'

c.PromptManager.in_template = '[\Y0/]\n[\#]: '
c.PromptManager.out_template = '[\#]: '
c.TerminalInteractiveShell.autocall = 1