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How to write to an existing excel file without overwriting data (using pandas)?
...17-08','2017-09','2017-10','2017-11','2017-12']
value1 = [x * 5+5 for x in range(len(months))]
df = pd.DataFrame(value1, index = months, columns = ['value1'])
df['value2'] = df['value1']+5
df['value3'] = df['value2']+5
#load workbook that has a chart in it
wb = xw.Book('C:\\data\\bookwithChart.xlsx...
How to see the changes between two commits without commits in-between?
...
What you want then is git range-diff B..A D..A0
– Thomas Guyot-Sionnest
2 days ago
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What does the “===” operator do in Ruby? [duplicate]
...Cool stuff. But, still they're not "real" operators. In your example, say, Range has an === method.
– Jacob Relkin
Dec 17 '10 at 4:14
2
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Why doesn't C have unsigned floats?
I know, the question seems to be strange. Programmers sometimes think too much. Please read on...
12 Answers
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Filter dict to contain only certain keys?
...h a dictionary of 26 items (timeit(..., setup="d = {chr(x+97):x+1 for x in range(26)}")), depending on how many items are being filtered out (filtering out consonant keys is faster than filtering out vowel keys because you're looking up fewer items). The difference in performance may very well becom...
Trim spaces from end of a NSString
...ngByTrimmingTrailingCharactersInSet:(NSCharacterSet *)characterSet {
NSRange rangeOfLastWantedCharacter = [self rangeOfCharacterFromSet:[characterSet invertedSet]
options:NSBackwardsSearch];
if (rangeOfLastWantedCharacter.locatio...
Remove last character from string. Swift language
...int(name) // "Dolphin"
print(truncated) // "Dolphi"
Using the removeRange() method (which alters the name):
var name: String = "Dolphin"
name.removeAtIndex(name.endIndex.predecessor())
print(name) // "Dolphi"
Using the dropLast() function:
var name: String = "Dolphin"
var truncated = ...
Performance of Find() vs. FirstOrDefault() [duplicate]
...<string>> source = Enumerable.ToList(Enumerable.Select(Enumerable.Range(0, 1000000), i =>
{
var local_0 = new
{
Name = Guid.NewGuid().ToString()
};
return local_0;
}));
source.Insert(999000, new
{
Name = diana
});
stopwatch.Re...
How to declare array of zeros in python (or an array of a certain size) [duplicate]
... you have to use a list comprehension like this:
buckets = [[0 for col in range(5)] for row in range(10)]
to avoid reference sharing between the rows.
This looks more clumsy than chester1000's code, but is essential if the values are supposed to be changed later. See the Python FAQ for more deta...
Is there a way to 'uniq' by column?
... first two fields. My awk-fu isn't strong enough to be able to unique on a range of fields, though. :(
– Soham Chowdhury
Jan 29 '17 at 6:43
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