py2qasm cli tool

[dakk]

Create a cli tool in the qlasskit/tools package called py2qasm that receives a python script (file or stdin) in input and outputs qasm code. The python script should contain at least one qlassf function.

• If not specified by --input-file/-i, read from stdin (-).
• If not specified by --entrypoint/-e, func_name is the last qlassf defined.
• If not specified by --output/-o, output to stdout
• If not specified by --compiler/-c use internal compiler (or tweedledum)
• If not specified by --qasm-version/-q use v3 qasm version

py2qasm -i pyfile [-e func_name] [-c internal] -o qasm_file

Provide also:

• -h\--help for usage
• -v\--version for qlasskit version

Requirements:

• Code should be placed on qlasskit/tools
• Use argparse for argument parsing
• Use qlasskit.tools.utils for getting qlassfs from file / string
• A test case must be provided in test_tools.py
• Keep an eye on issue #28

Please read CONTRIBUTING.md before contributing.