What Is a Parse Error and How to Fix It

what is a parse error and how do I fix it

You have some sort of invisible character that the validator is choking on somewhere (ie. it looks and acts like a space, but it isn't the space). If I view your CSS file directly and copy/paste the contents into the CSS validator's direct input validation, it validates.

What is a CSS Parse error and how do I fix it?

There's an HTML tag in line 5 of your CSS file :

<a class="btn-alt"></a>

I don't know if it's a typo in the actual code or the result of you posting here, but this is a problem.

There's also a semi-colon when it should be a colon in line 16, your last style for the .btn class :

margin; 0;

This should be :

margin: 0;

How to fix parse error (possibly incorrect indentation or mismatched brackets) in Haskell

The error is in this definition:

anteilImKreis :: Double -> Double
let l = length(punkteImKreis)
in anteilImKreis k = (fromIntegral (l)) / k^2

let is an expression; therefore, it has to be inside a definition (that is, on the right of an = sign). This should be:

anteilImKreis :: Double -> Double
anteilImKreis k =
  let l = length(punkteImKreis)
  in (fromIntegral (l)) / k^2

By the way, you don't really need parentheses around an argument of a function when it's just one identifier. I would rewrite this as follows:

anteilImKreis :: Double -> Double
anteilImKreis k =
  let l = length punkteImKreis
  in (fromIntegral l) / k^2

Additionally, this exposes another error. punkteImKreis isn't a list; it's a function which returns a list, which means you can't directly take its length. I would assume you meant the following:

anteilImKreis :: Double -> Double
anteilImKreis k =
  let l = length (punkteImKreis k)
  in (fromIntegral l) / k^2

How does one fix a parsing error with what seems a valid s-expression in Python?

You need to fix sexp to be a normal string.

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The failing code referenced in your stacktrace

        elif c == "'":
            (i, subsexp) = self.parse_sexp(i + 1)
            append(Quoted(subsexp[0]))
            sexp.extend(subsexp[1:])

suggests that somehow, you have an apostrophe in your expression. (Debugging would show that clearly.) Where could it come from?

  File "/Users/korkejudith/home_simulation_research/coq-serapi-python/python_api/ai_mathematician.py", line 33, in __call__
    psexp = loads(str(sexp))

This is the culprit. In Python 3, str(bytes) is its repr.

Parse error when parsing manifest. Discontinuing installation

If somebody comes around the same problem. I was able to fix it by not using the signing function in Androidstudio but by manually using jarsigner and zipalign from java and the android-sdk-tools.

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