<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def build(python=PYTHON):
 """Build the bigfloat library for in-place testing."""

    clean()
    local(
        "LIBRARY_PATH={library_path} CPATH={include_path} {python} "
        "setup.py build_ext --inplace".format(
            library_path=LIBRARY_PATH,
            include_path=INCLUDE_PATH,
            python=python,
        ))