Fixed database typo and removed unnecessary class identifier.

venv/Lib/site-packages/scipy/special/_precompute/expn_asy.py

@@ -0,0 +1,59 @@
+"""Precompute the polynomials for the asymptotic expansion of the
+generalized exponential integral.
+
+Sources
+-------
+[1] NIST, Digital Library of Mathematical Functions,
+    https://dlmf.nist.gov/8.20#ii
+
+"""
+import os
+from numpy.testing import suppress_warnings
+
+try:
+    # Can remove when sympy #11255 is resolved; see
+    # https://github.com/sympy/sympy/issues/11255
+    with suppress_warnings() as sup:
+        sup.filter(DeprecationWarning, "inspect.getargspec.. is deprecated")
+        import sympy  # type: ignore[import]
+        from sympy import Poly
+        x = sympy.symbols('x')
+except ImportError:
+    pass
+
+
+def generate_A(K):
+    A = [Poly(1, x)]
+    for k in range(K):
+        A.append(Poly(1 - 2*k*x, x)*A[k] + Poly(x*(x + 1))*A[k].diff())
+    return A
+
+
+WARNING = """\
+/* This file was automatically generated by _precompute/expn_asy.py.
+ * Do not edit it manually!
+ */
+"""
+
+
+def main():
+    print(__doc__)
+    fn = os.path.join('..', 'cephes', 'expn.h')
+
+    K = 12
+    A = generate_A(K)
+    with open(fn + '.new', 'w') as f:
+        f.write(WARNING)
+        f.write("#define nA {}\n".format(len(A)))
+        for k, Ak in enumerate(A):
+            tmp = ', '.join([str(x.evalf(18)) for x in Ak.coeffs()])
+            f.write("static const double A{}[] = {{{}}};\n".format(k, tmp))
+        tmp = ", ".join(["A{}".format(k) for k in range(K + 1)])
+        f.write("static const double *A[] = {{{}}};\n".format(tmp))
+        tmp = ", ".join([str(Ak.degree()) for Ak in A])
+        f.write("static const int Adegs[] = {{{}}};\n".format(tmp))
+    os.rename(fn + '.new', fn)
+
+
+if __name__ == "__main__":
+    main()