Dec 19, 2008 · I just want to know how to parse a float string to a float, and (separately) an int string to an int. It's good that you ask to do these separately. If you're mixing them, you may be setting yourself up for problems later. The simple answer is: "545.2222" to float: >>> float("545.2222") 545.2222 "31" to an integer: >>> int("31") 31

Apr 10, 2009 · I've got some Python code that runs through a list of strings and converts them to integers or floating point numbers if possible. Doing this for integers is pretty easy if element.isdigit():

Make sure that the value in the string itself is a valid floating point number first, for example "1.4abf" is not a proper float. – InfiniteStack Commented Aug 11, 2023 at 17:33

float(item) do the right thing: it converts its argument to float and and return it, but it doesn't change argument in-place. A simple fix for your code is: new_list = [] for item in list: new_list.append(float(item)) The same code can written shorter using list comprehension: new_list = [float(i) for i in list] To change list in-place:

Feb 8, 2012 · This is my code, trying to convert the second field of the line from exponential into float. outputrrd = processrrd.communicate() (output, error) = outputrrd output_lines = output.split('\n') for ...

Apr 1, 2015 · In this case, you're seeing .1 converted to a string using repr: >>> repr(.1) '0.10000000000000001' I believe python chops off the last few digits when you use str() in order to work around this problem, but it's a partial workaround that doesn't substitute for understanding what's going on. >>> str(.1) '0.1'

May 30, 2017 · NOTE: pd.convert_objects has now been deprecated. You should use pd.Series.astype(float) or pd.to_numeric as described in other answers.

Oct 6, 2010 · Well, if you're reading the data in as a list, just do np.array(map(float, list_of_strings)) (or equivalently, use a list comprehension). (In Python 3, you'll need to call list on the map return value if you use map, since map returns an iterator now.) However, if it's already a numpy array of strings, there's a better way. Use astype().

Jul 9, 2011 · How can I convert a string like 123,456.908 to float 123456.908 in Python? For int s, see How to convert a string to a number if it has commas in it as thousands separators? , although the techniques are essentially the same.

When I try to convert it into float using np.float(a) or just float(a), I get *** Value error: could not convert string to float: '92.345' How do I convert it cleanly to a float?