File object also known as file handler is a tool used to read and write data to a file on a disk. All the functions such as reading data from a file, writing data in a file, closing data file etc are performed through file objects.
What is the significance of file-object? Read More »
“w” and “a” are fie modes which determines the type of operation to be done on data file. Both are used for writing data in a file. The difference between them is- – In “a” mode existing data of file is retained and new data is inserted at the end.– In “w” mode existing data
What is the difference between “w” and “a” modes? Read More »
import <module> It import entire module and so everything inside the module will be imported like functions, constant, variables.In this way after importing the module we can use any function of imported module as per given syntax-module.<functionname>() For example import mathprint(math.pi)print(math.sum([10,20])) from <module> import statement from <module> import statement imports selected items , but to
Explain the difference between import and from import statement, with example. Read More »
Standard library is built in library with predefined modules in python. It is automatically installed with python installation and we can access any object of these module without referring their module name and dot notation. Some common module of python standard library are- Math N NumPy SciPy tkniter Matplotlib
What do you understand by standard library of Python? Read More »
We should avoid importing any object like from <module> import <object> because in this way object is added in current namespace and if any existing variable’s name resembles with the variable imported via module, so imported variable is ignored.
Why should the form import Read More »
To access any object inside a module it must be associated with it’s module using dot operator as –<module name>.<object name>
What is dot notation of referring to objects inside a module? Read More »
help() – it is built in function python which when executed, returns docstring along with module name, filename, function name and constant of the module passed as argument. dir()- it is built in function in python which is used to display properties and methods of object passed as an argument in it. Here object can
What is the usage of help() and dir() functions. Read More »
The order in which python looks for the function/module names used by you are- First it searches for built in version If not found built in version, than searches for file in info.py under the directory of python installation.
In which order Python looks for the function/module names used by you? Read More »
PYTHONPATH is an environment variable which is used to store the path of the user defined module. And so help python interpreter to locate module while importing.
What is PYTHONPATH variable? What is its significance? Read More »
import X It import entire X module and so everything inside the X module will be imported like functions, constant, variables.In this way after importing the module we can use any function of X as per given syntax-X.<functionname>() from X import * It import entire X module with all items, but to use these items
