Calculation of contrast factors of dislocations in crystals using Python. Ref. Ungar et al [J. Appl. Cryst. (1999). 32, 992-1002], Dragomir and Ungar [Powder Diffraction 17 (2), June 2002], and Dragomir and Ungar [J. Appl. Cryst. (2002). 35, 556-564] - View it on GitHub