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Re-ordering columns in pandas dataframe based on column name [duplicate]
...
df = df.reindex(sorted(df.columns), axis=1)
This assumes that sorting the column names will give the order you want. If your column names won't sort lexicographically (e.g., if you want column Q10.3 to appear after Q9.1), you'll need to...
Remove multiple whitespaces
... to be replaced with space. Now his pattern does not match these, say for $x = "does\nthis\twork"; The OP wants all whitespace to be replaced with a single space.
– codaddict
Feb 24 '10 at 13:17
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How can I add new keys to a dictionary?
...ir on a dictionary by assigning a value
to that key. If the key doesn't exist, it's added and points to that
value. If it exists, the current value it points to is overwritten.
—R. Navega
share
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CSV new-line character seen in unquoted field error
....reader(self.file)
with:
file_read = csv.reader(self.file, dialect=csv.excel_tab)
Or, open a file with universal newline mode and pass it to csv.reader, like:
reader = csv.reader(open(self.file, 'rU'), dialect=csv.excel_tab)
Or, use splitlines(), like this:
def read_file(self):
with ope...
Print current call stack from a method in Python code
...
Here's an example of getting the stack via the traceback module, and printing it:
import traceback
def f():
g()
def g():
for line in traceback.format_stack():
print(line.strip())
f()
# Prints:
# File "so-stack.py", ...
How do I make a UITableViewCell appear disabled?
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You can just disable the cell's text fields to gray them out:
Swift 4.x
cell!.isUserInteractionEnabled = false
cell!.textLabel!.isEnabled = false
cell!.detailTextLabel!.isEnabled = false
...
Why would one use nested classes in C++?
... public:
int data;
Node* next;
Node* prev;
};
private:
Node* head;
Node* tail;
};
Here I don't want to expose Node as other people may decide to use the class and that would hinder me from updatin...
How do I get the MAX row with a GROUP BY in LINQ query?
...
using (DataContext dc = new DataContext())
{
var q = from t in dc.TableTests
group t by t.SerialNumber
into g
select new
{
...
Why do people put code like “throw 1; ” and “for(;;);” in front of json responses? [du
...ey'll be the attacker's own versions of those objects, with potentially-unexpected behaviour.
For example, you can hack a setter-property into Object, that would betray the values written in object literals:
Object.prototype.__defineSetter__('x', function(x) {
alert('Ha! I steal '+x);
});
Th...
Regular expression to match numbers with or without commas and decimals in text
I'm trying to locate and replace all numbers in a body of text. I've found a few example regex's, which almost solve the problem, but none are perfect yet. The problem I have is that the numbers in my text may or may not have decimals and commas. For example:
...