-c ../constraints.txt

chem                                # A helper library for chemistry calculations
cryptography                        # Implementations of assorted cryptography algorithms
lxml[html_clean]                    # XML parser
matplotlib                          # 2D plotting library
networkx                            # Utilities for creating, manipulating, and studying network graphs
nltk                                # Natural language processing; used by the chem package
openedx-calc
pyparsing                           # Python Parsing module
random2                             # Implementation of random module that works identically under Python 2 and 3
scipy                               # Math, science, and engineering library
sympy                               # Symbolic math library
codejail-includes                   # CodeJail manages execution of untrusted code in secure sandboxes.