R: specifying variable name in function parameter for a function of general (universal) use.Reading function input values defined in `.` from an CSV file in R.Transform each column factors in a column containing just `0` or `1`.Assign value to row if row and previous row meet requirement.Bind residuals to input dataset with missing values.

In R, collapse over multiple logical rows of the same ID into 1 row.How to combine columns within one ame that contain NA's in order to remove NA's.It is an object that records the operations done to it and it can store them as a 'script' which can be replayed. None always has no data and can not be subscriptable.Ī subscriptable object is any object that implements the _getitem_ special method (think lists, dictionaries). So you would get a TypeError if you tried list1 = list.sort(list1) because here you are setting it to None. a number outside expected boundaries) should result in a ValueError. passing a list when an int is expected) should result in a TypeError, but passing arguments with the wrong value (e.g. Passing arguments of the wrong type (e.g. The Typeerror may be raised by user code to indicate that an attempted operation on an object is not supported, and is not meant to be. You can reproduce TypeError that you get in your code if you try this at the Python command line: This TypeError is the one thrown by python when you use the square bracket notation object where an object doesn't define the _getitem_ method. This is a design principle for all mutable data structures in Python. You might have noticed that the method sort() that only modify the list have no return value printed – they return the default None. In general, the error means that you attempted to index an object that doesn't have that functionality. In order to correct this error this should be None always has no data and can not be subscriptable. List1 = list.sort(list1) : - here, you are setting it to None. NoneType is the type of the None object which represents a lack of value, for example, a function that does not explicitly return a value will return None. You are trying to subscript an object which you think is a list or dict, but actually is None. TypeError: 'NoneType' object is not subscriptable

Expected a dict object