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How can I format a decimal to always show 2 decimal places?
...s Decimal('0.01')
>>> # Round to two places
>>> Decimal('3.214').quantize(TWOPLACES)
Decimal('3.21')
>>> # Validate that a number does not exceed two places
>>> Decimal('3.21').quantize(TWOPLACES, context=Context(traps=[Inexact]))
Decimal('3.21')
>>> Deci...
Read stream twice
...
Captain Man
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answered Feb 29 '12 at 14:59
Paul GrimePaul Grime
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Why don't structs support inheritance?
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edited Oct 9 '15 at 11:53
nevermind
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answered Aug 3 '09 at 16...
What is the difference between String.slice and String.substring?
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answered Feb 11 '10 at 10:36
Daniel VassalloDaniel Vassallo
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C++ performance challenge: integer to std::string conversion
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13 Answers
13
Active
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Looping through a hash, or using an array in PowerShell
... property. Here is an example how:
$hash = @{
a = 1
b = 2
c = 3
}
$hash.Keys | % { "key = $_ , value = " + $hash.Item($_) }
Output:
key = c , value = 3
key = a , value = 1
key = b , value = 2
share
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What does the 'b' character do in front of a string literal?
... it indicates that the
literal should become a bytes literal
in Python 3 (e.g. when code is
automatically converted with 2to3). A
'u' or 'b' prefix may be followed by
an 'r' prefix.
The Python 3 documentation states:
Bytes literals are always prefixed with 'b' or 'B'; they produce an...
Get the week start date and week end date from week number
...
3
Bear in mind that setting DATEFIRST to anything other than 7 breaks this.
– Tomalak
Aug 12 '09 at 16:...
Is there a better way of writing v = (v == 0 ? 1 : 0); [closed]
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31 Answers
31
Active
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Insert a row to pandas dataframe
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Just assign row to a particular index, using loc:
df.loc[-1] = [2, 3, 4] # adding a row
df.index = df.index + 1 # shifting index
df = df.sort_index() # sorting by index
And you get, as desired:
A B C
0 2 3 4
1 5 6 7
2 7 8 9
See in Pandas documentation Indexing: Setti...