chore: import upstream snapshot with attribution

2026-07-13 12:32:53 +08:00
commit 2a16f2f53b
247 changed files with 69150 additions and 0 deletions
@@ -0,0 +1,35 @@
+"""
+Function plotting demo.
+"""
+from mpmath import *
+
+def main():
+    print("""
+    Simple function plotting. You can enter one or several
+    formulas, in ordinary Python syntax and using the mpmath
+    function library. The variable is 'x'. So for example
+    the input "sin(x/2)" (without quotation marks) defines
+    a valid function.
+    """)
+    functions = []
+    for i in range(10):
+        if i == 0:
+            s = input('Enter a function: ')
+        else:
+            s = input('Enter another function (optional): ')
+        if not s:
+            print()
+            break
+        f = eval("lambda x: " + s)
+        functions.append(f)
+        print("Added f(x) = " + s)
+        print()
+    xlim = input('Enter xmin, xmax (optional): ')
+    if xlim:
+        xlim = eval(xlim)
+    else:
+        xlim = [-5, 5]
+    print("Plotting...")
+    plot(functions, xlim=xlim)
+
+main()