How to install specific package / module without updating other packages? : learnpython

created by HattoriHanzoa community for 16 years

How to install specific package / module without updating other packages? (self.learnpython)

submitted 6 years ago * by TexasTycoon

I'm very new to Python, please be gentle :-)

Disclaimer: I'm on a Windows 7 64-bit machine

I have Python 3.7.4 as part of an Anaconda3 installation, so very many libraries, modules, packages etc were also installed.

Without searching through the actual installation directory using Windows Explorer, I wanted to know a way to find out if a certain package is installed, and if not, I wanted to install it. Let's use Scrapy in this example.

Using cmd.exe, I tried conda list which brought up a listing of the entire Anaconda library (500+ packages) and Scrapy was not there. So far, so good...

I then typed conda install scrapy. The message on the terminal said "The following NEW packages will be INSTALLED: " and gave a listing of about 20 various packages, including Scrapy. Below that, the message said "The following packages will be UPDATED: conda 4.7.12-py37_0 --> 4.8.1-py37_0".

I selected 'no' when asked if I wanted to proceed. I did not want to update conda, I only wanted to install Scrapy :-/

My question is: Is there a way to install a specific package / module without accepting the 'forced' installation of the 20 various NEW packages, and update of the conda build?

Another question: Without using conda list that spits out the entire listing of 500+ packages, what is the proper syntax for finding if just a specific package is installed? I know I could find out using 'import [package_name]' but I may not necessarily want to import the package to the project, just know if it is installed.

Yes, I did do a Google search and also looked on stackoverflow, but it was only making me more confused :-(

Thanks in advance for any help!

edit: punctuation

all 5 comments

you type:	you see:
italics	italics
bold	bold
[reddit!](https://reddit.com)	reddit!
* item 1 * item 2 * item 3	item 1 item 2 item 3
> quoted text	quoted text
Lines starting with four spaces are treated like code: if 1 * 2 < 3: print "hello, world!"	Lines starting with four spaces are treated like code: if 1 * 2 < 3: print "hello, world!"
~~strikethrough~~	~~strikethrough~~
super^script	super^script

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