2012年2月25日 · It depends on how you want to access the import when you refer to it. from urllib import request # access request directly. mine = request() import urllib.request # used as urllib.request mine = urllib.request()

By default, you can't. When importing a file, Python only searches the directory that the entry-point script is running from and sys.path which includes locations such as the package installation directory (it's actually a little more complex than this, but this covers most cases).

import module is the preferred style if the module name is short as for example most of the packages in the standard library. It is also the preferred style if I need to use names from the module in only two or three places in my own module; clarity trumps brevity then ( …

2024年6月3日 · Example 5, use os.system("python yourfile.py") import os os.system("python yourfile.py") Example 6, import your file via piggybacking the Python startuphook: This example used to work for both Python 2 and Python 3, but now only works for Python 2.

2013年1月13日 · Next, I opened python and typed 'import sys', then 'sys.path' to show where my python searches for any packages I import. Alas, the location shown in the first step was NOT in the list. Final step, I typed 'sys.path.append('package_location_seen_in_step_1'). You optionally can repeat step two to see the location is now in the list.

2014年10月28日 · Since I am also a beginner, I will be trying to explain this in a simple way: In Python, we have three types of import statements which are: 1. Generic imports: import math this type of import is my personal favorite, the only downside to this import technique is that if you need use any module's function you must use the following syntax: math ...

2011年7月28日 · @agf: There's very rarely a reason to import conditionally though. Especially with the modules OP uses, those are probably already in use by the implementation (try python -c "import sys; print sys.modules.keys()"). –

2017年1月10日 · json is in the standard library since 2.6; simplejson is a third-party library. The reasons to look for simplejson are because it's needed (older Python version) or preferred (consciously installed by the user to take advantage of extra functionality).

Python style guides encourage programmers to place all imports at the beginning of the module file. Importing at the start is part of the philosophy and style of Python. As you've shown in your code a way of improving efficiency is importing only what you need like : …

Yes, you can define aliases for imported modules in Python. Using pandas is considered a best practice in python because Pandas can import most file formats and link to databases. Example: Import pandas library. import pandas as pd . Explaining: pd: is the conventional alias for pandas. NP: is the conventional alias for Numpy.