title: What causes Python error 'bad escape \C'?
body: <p>I just wrote a function that will look at a text file and count all of the instances of True and False in the text file. Here is my file</p>
  
  <pre><code>ATOM     43  CA  LYS A   5      14.038  15.691  37.608  1.00 15.15           C      True
  ATOM     52  CA  CYS A   6      16.184  12.782  38.807  1.00 16.72           C      True
  ATOM     58  CA  GLU A   7      17.496  12.053  35.319  1.00 14.06           C      False
  ATOM     67  CA  VAL A   8      18.375  15.721  34.871  1.00 12.27           C      True
  ATOM     74  CA  PHE A   9      20.066  15.836  38.288  1.00 12.13           C      False
  ATOM     85  CA  GLN A  10      22.355  12.978  37.249  1.00 12.54           C      False
  </code></pre>
  
  <p>And here is my code </p>
  
  <pre><code>def TFCount(txtFileName):   
      with open(txtFileName, 'r') as e:
          T = 0
          F = 0
          for record in e:
              if(re.search(r'^ATOM\s+\d+\s+\CA\s+\w+\s+\w+\s+\d+\s+\d+\.\d+\s+\d+\.\d+\s+\d+\.\d+\s+\d+\.\d+\s+\d+\.\d+\s+\w+\s+\T', record)):
                  T += 1
              else:
                  F += 1
          print(T)
          print(F)
  </code></pre>
  
  <p>I apologize if my regex is long and tedious to read, but this is the only way I know of counting the number of times True occurs in the file. As you can see, each time the program encounters True, it will add 1 to the variable T, otherwise it will add 1 to the variable False. After attempting to run the program, the interpreter returns error: bad escape \C. What does this error mean? And what in my code is causing it? </p>