Acccumulation questions

Acccumulation answers

• what is C parameter in sklearn Logistic Regression?
• Efficiently compute n-body gravitation in python
• How to treat NULL as a normal string with pandas?
• Can mathematical operators *, /, +, -, ^ be used to convert a non-zero number to 1?
• Pandas: Sum Previous N Rows by Group
• TypeError: 'dict_items' object is not subscriptable on running if statement to shortlist items
• pandas pivot table - changing order of non-index columns