def install_payload_page():
    from IPython.core import page as corepage
    corepage.page = page
Username must be unique
dataset/ETHPy150Open ipython/ipython-py3k/IPython/core/payloadpage.py/install_payload_page--crossover with--dataset/ETHPy150Open lingthio/Flask-User/flask_user/forms.py/unique_username_validator