I am having the folllowing instruction x1,y1,x2,y2,x3,y3,xp,yp = map(float, input().split()) When I am trying to execute it for a fractional value, e.g. 8/3, I get an error message. x1,y1,x2,y2,x3,y3,xp,yp = map(float, input().split()) 0.1 0.2 -8 -16.67 0 0.1 8/3 1 # output Traceback (most recent call last): File "<pyshell#42>", line 1, in <module> x1,y1,x2,y2,x3,y3,xp,yp =… Read More ValueError: could not convert string to float: '8/3'

I have a csv file to be read by pandas, and it has the form as following: name, quart2c, p_rat, other_col avg, 1, 2, 3 std, 1, 2, 3 I want to pandas.read_csv() guarantee that all cells have the type of float32, except the first column(‘name’) because that is the index column. Hence I pass… Read More How to prevent "pandas.read_csv" convert index column to float with arg 'dtype=np.float32'?

So I have a string below ‘user.name.firstName=Anatoliy&user.name.lastName=Klimov&user.vip=true’ I’ve to parse it to Object looks like { "user": { "name": { "firstname": "", "lastname": "" { "vip": true } } >Solution : Here’s an approach const data = ‘user.name.firstName=Anatoliy&user.name.lastName=Klimov&user.vip=true’; const constructObject = (str) => { const paths = str.split(‘&’); const result = {}; paths.forEach((path) => {… Read More How can I parse random string to an object javascript

template <class T> void func(T*& a) { } int main() { int a[5]; func(a); // <– Error here: no matching function for call to ‘func(int [5])’ return 0; } why int[] is not implicitly converted to int* so that it can match template functions? >Solution : There are 2 things that are important here: Since… Read More Why int[] cannot be converted to T*&?

I’m trying to carry out a conversion from a string to a double. I have values like "000.2" or "000.7". I’m trying to use them for a chart. But when I use y = Convert.ToDouble(dataGridView1.Rows[i].Cells[2].Value); and the actual value of the dataGridView is "000.7" the output will be 7???? I do not understand this. int… Read More Conversion from string to double doesn't work well

How can I convert the following string format of datetime into datetime object to be used in pandas Dataframe? I tried many examples, but it seems my format is different from the standard Pandas datetime object. I know this could be a repetition, but I tried solutions on the Stackexchange, but they don’t work! >Solution… Read More How can I convert following string date-time into pandas datetime

I have a dataframe like below Each row has a different length. I’m trying to run the code below for i in range(len(df)): df[‘ColumnA’][i] = df[‘ColumnA’][i].astype(int) I’m getting an error because some rows have like "64B", "64A" string values. For example, df[‘ColumnA’][37] Output: array([’34’, ’35’, ’36’, ’38’, ’39’, ’40’, ’41’, ’56’, ’58’, ’59’, ’60’, ’61’,… Read More Deleting characters in arrays while converting rows to integer in DataFrame

the string will be the price of some product, so it will basically come like this ‘1,433.10’, the problem is that I need to compare it with the value that the user enters in an input that is only possible to enter integers because of the isdigit() method , used to check if the input… Read More how to convert a string with floats numbers to another data type?

I have this SQL query is MySql, not working: select email, cast(select tag from user_tags where userid=users.id limit 1,date) as date from users The error is: "select" is not valid at this position for this server version, and it highlights the select right after cast. >Solution : You can cast a column but not a… Read More Convert a SELECT column to Date in MySql

To avoid the XY problem, here’s what I originally want to do: I have a path: /foo/bar/bloo/baz/file.txt and would like the most efficient way to obtain bloo/baz/file.txt from that, essentially skipping all ancestors before a specific component (in this case "bloo"). The approach that seemed most sensible to me was to use the components function… Read More Converting a generic Iterator (e.g. SkipWhile) back to a specialised iterator (e.g. std::path::Components)