added Python script

script1.py

+filename = 'exampleSequences1.fasta'
+handle = open(filename, 'r')
+for line in handle.readlines():
+    if line[0] == '>':
+      print(line)
+      a = 0
+      c = 0
+      g = 0
+      t = 0
+    else:
+      for l in line:
+          if l == 'A':
+              a = a + 1
+          elif l == 'C':
+              c = c + 1
+          elif l == 'G':
+              g = g +1
+          else:
+              t = t + 1
+      print('nucleotide content:')
+      print('A:', str(a))
+      print('C:', str(c))
+      print('G:', str(g))
+      print('T:', str(t))
+      x = float(c + g) / (c + g + a + t)
+      print(x)
+      
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