Commit 15a2a611 by Bertrand NÉRON

### 🐛 remove comment specific to python2

parent 271c4860
 ... ... @@ -40,23 +40,16 @@ Use the Python interpreter to check your answers. :: 8.5 >>> height / 3 4.0 >>> # one of the operand is a float (2.0 or height) then python pyhton perform afloat division but keep in mind that float numbers are aproximation. >>> # if you need precision you need to use Decimal. But operations on Decimal are slow and float offer quite enought precision >>> # one of the operand is a float (2.0 or height) then python pyhton perform a float division but keep in mind that float numbers are approximation. >>> # if you need precision you need to use Decimal. But operations on Decimal are slow and float offer quite enough precision >>> # so we use decimal only if wee need great precision >>> # Euclidian division >>> 2 / 3 >>> 2 // 3 0 >>> # float division >>> float(2)/float(3) >>> 2 / 3 0.6666666666666666 >>> # decimal division >>> from decimal import Decimal >>> a = Decimal(2) >>> b = Decimal(3) >>> a / b Decimal('0.6666666666666666666666666667') >>> 1 + 2 * 5 11 Exercise ... ... @@ -76,9 +69,7 @@ after that, you can use ``math.pi`` everywhere in the file like this:: >>> >>> #do what you need to do >>> math.pi #use math.pi **Hint**: the volume of a spher with radius 5 is **not** 392.7 ! .. literalinclude:: _static/code/vol_of_sphere.py :linenos: :language: python ... ... @@ -257,9 +248,10 @@ for the enzymes which have a recognition site can you give their positions? :: is there only one site in sv40 per enzyme? The ``find`` method give the index of the first occurence or -1 if the substring is not found. So we can not determine the occurence of a site only with the find method. We will see how to do that when we learn looping and conditions. The ``find`` method give the index of the first occurrence or -1 if the substring is not found. So we can not determine the occurrences of a site only with the find method. We can know how many sites are present with the ``count`` method. We will see how to determine the site of all occurrences when we learn looping and conditions. Exercise ... ... @@ -381,14 +373,8 @@ use sv40 sequence to test your function. >>> >>> sequence = fasta_to_one_line(sv40) >>> gc_pc = gc_percent(sequence) >>> report = the sv40 is {0} bp length and have {1:.2%} gc".format(len(sequence), gc_pc) >>> report = "the sv40 is {0} bp length and have {1:.2%} gc".format(len(sequence), gc_pc) >>> print report 'the sv40 is 5243 bp length and have 40.80% gc' :download:`gc_percent.py <_static/code/gc_percent.py>` . :: gc_pc = float(sv40_sequence.count('g') + sv40_sequence.count('c')) / float(len(sv40_sequence)) "the sv40 is {0} bp lenght and have {1:.2%} gc".format(len(sv40), gc_pc) \ No newline at end of file
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