--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/char_hist.py	Sun Feb 19 16:44:06 2023 +0000
@@ -0,0 +1,43 @@
+#!/usr/bin/python3
+import sys
+
+h={}
+mc=0
+nonAscii=0
+
+if len(sys.argv)>1:
+  showMe=[int(a) for a in sys.argv[1:]]
+else:
+  showMe=[]
+
+def main():
+  global h, mc, nonAscii, showMe
+  for l in sys.stdin:
+    na=0
+    sm=0
+    for c in l:
+      h[c]=h.get(c,0)+1
+      o=ord(c)
+      sm+=(o in showMe)
+      na+=(o>127)
+      if o>mc:
+        mc=o
+    if na>0:
+      nonAscii+=1
+    if sm>0:
+      sys.stderr.write(l)
+
+  for i in range(128):
+    print(i,chr(i),h.get(chr(i),0))
+  print('-------')
+  if nonAscii>0:
+    print("%s lines with one or more non-ascii characters"%nonAscii)
+  for i in range(128,mc+1):
+    c=chr(i)
+    if c in h:
+      print(i,c,h[c])
+
+if __name__ == '__main__':
+  main()
+
+