How do I install opencv using pip?

I need to install cv2 for a script that has been written for me. I tried pip install cv2 and pip install open_cv and got the same problem – a warning message from dist.py and complains about zlib being not found. No cv2 installed. I also tried pyopenvc and pip install opencv-python.

So, I went to the opencv site and downloaded the relevant exe. Ran it – generated a heap of subdirectories and a make file and stuff.

What do I do now?

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