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To check if you can import something in Python 2, you can use imp module with try...except. For example, import imp try: imp.find_module('eggs') found = True except ImportError: found = False print foundThis will give you the output:FalseYou can also use iter_modules from the pkgutil module to iterate over all modules to find if specified module exists. For example, from pkgutil import iter_modules def module_exists(module_name): return module_name in (name for loader, name, ispkg in iter_modules()) print module_exists('scrapy')This will give the output:TrueThis is because this module is installed on my PC.Or if you ... Read More
The HTML Window screenX property returns the horizontal coordinates of the window relative to the screen. It is supported by all browsers.SyntaxFollowing is the syntax −window.screenXLet us see an example of HTML Window screenX Property −Example Live Demo body { color: #000; height: 100vh; background-color: #8BC6EC; background-image: linear-gradient(135deg, #8BC6EC 0%, #9599E2 100%); text-align: center; } .btn { background: #db133a; border: none; height: 2rem; border-radius: 2px; width: ... Read More
You can use pip to install packages at runtime and importlib.import_module(moduleName) to import module by using its name as a string. For example,import pip import importlib def import_with_auto_install(package): try: return importlib.import_module(package) except ImportError: pip.main(['install', package]) return importlib.import_module(package) # Example if __name__ == '__main__': scrapy = import_with_auto_install('scrapy') print(scrapy)The above script installs the scrapy module and imports it when installation of the module completes.
In Python, a namespace package allows you to spread Python code among several projects. This is useful when you want to release related libraries as separate downloads. For example, with the directories Package-1 and Package-2 in PYTHONPATH, Package-1/namespace/__init__.py Package-1/namespace/module1/__init__.py Package-2/namespace/__init__.py Package-2/namespace/module2/__init__.py the end-user can import namespace.module1 and import namespace.module2.On Python 3.3, you don't have to do anything, just don't put any __init__.py in your namespace package directories and it will just work. This is because Python 3.3 introduces implicit namespace packages.On older versions, there's a standard module, called pkgutil, with which you can 'append' modules to a given namespace. You ... Read More
The HTML Window screenTop property returns the vertical coordinates of the window relative to the screen. It is not supported by firefox browser.SyntaxFollowing is the syntax −window.screenTopLet us see an example of HTML Window screenTop Property −Example Live Demo body { color: #000; height: 100vh; background-color: #8BC6EC; background-image: linear-gradient(135deg, #8BC6EC 0%, #9599E2 100%); text-align: center; } .btn { background: #db133a; border: none; height: 2rem; border-radius: 2px; ... Read More
The HTML Window screenLeft property returns the horizontal coordinates of the window relative to the screen. It is not supported by firefox browser.SyntaxFollowing is the syntax −window.screenLeftLet us see an example of HTML Window screenLeft Property −Example Live Demo body { color: #000; height: 100vh; background-color: #8BC6EC; background-image: linear-gradient(135deg, #8BC6EC 0%, #9599E2 100%); text-align: center; } .btn { background: #db133a; border: none; height: 2rem; border-radius: 2px; ... Read More
The HTML Window name property returns and modify the name of the window.SyntaxFollowing is the syntax −1. Returning namewindow.name2. Adding namewindow.name=”text”Let us see an example of HTML Window name Property −Example Live Demo body { color: #000; height: 100vh; background-color: #8BC6EC; background-image: linear-gradient(135deg, #8BC6EC 0%, #9599E2 100%); text-align: center; } .btn { background: #db133a; border: none; height: 2rem; border-radius: 2px; width: 40%; display: ... Read More
The HTML Window outerWidth property returns the width of the browser window including all interface elements.SyntaxFollowing is the syntax −window.outerWidthLet us see an example of HTML Window outerWidth Property −Example Live Demo body { color: #000; height: 100vh; background-color: #8BC6EC; background-image: linear-gradient(135deg, #8BC6EC 0%, #9599E2 100%); text-align: center; } .btn { background: #db133a; border: none; height: 2rem; border-radius: 2px; width: 40%; display: block; ... Read More
The HTML Window outerHeight property returns the height of the browser window including all interface elements.SyntaxFollowing is the syntax −window.outerHeightLet us see an example of HTML Window outerHeight Property −Example Live Demo body { color: #000; height: 100vh; background-color: #8BC6EC; background-image: linear-gradient(135deg, #8BC6EC 0%, #9599E2 100%); text-align: center; } .btn { background: #db133a; border: none; height: 2rem; border-radius: 2px; width: 40%; display: block; ... Read More
The HTML Window innerWidth property returns the width of the content area of a window in an HTML document.SyntaxFollowing is the syntax −window.innerWidthLet us see an example of HTML Window innerWidth Property −Example Live Demo body { color: #000; height: 100vh; background-color: #8BC6EC; background-image: linear-gradient(135deg, #8BC6EC 0%, #9599E2 100%); text-align: center; } .btn { background: #db133a; border: none; height: 2rem; border-radius: 2px; width: 40%; ... Read More