. time() time. :
import time
time1 = time.time()
L=[x*x for x in range(1,100)]
print ("=",time.time()-time1)
matplotlib
import matplotlibasmpl
mpl.rcParams['font.size'] = 15
from PyQt4 import QtCore, QtGui
import sys
app = QtGui.QApplication(sys.argv)# app () - QApplication
w = QtGui.QWidget()
Fn=QtGui.QFileDialog.getOpenFileName(w,'Open file', '',"Comma separated table files.csv (*.csv)")
np.sum()
1. L n.
2. , L , f(x)= lambda
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a.
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c. , . 720 -360⁰ 360⁰. 360⁰ 1080⁰, .
d. , .
e.
f. , , ,
g.
, : , λ=0.24, ε=14. p(V)
h. 0⁰ 720⁰. , () , 2 .
i. ( 0 720 ). , .
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a. M(α), M(α+60) ( 60⁰), M(α)+M(α+60).
b. . "" .
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c. ( ) "" .
7. TZ.txt , , - X Y , ( 0 720 ).
a. ( [X,Y]).
b. ( [X,Y]).
c. X Y. ( - [X,Y]). 90 [X1,Y1] [X1,Y1].
d. X Y. .
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α=1,6*10-5 2/.
.
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1) z u /. . .
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5) . , F=pi*d^2/4. F=pi*(d^2)/4. .
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6) -1*, -. , F=-a-b*(-sin(c)) F=-1*a-b*(-1*sin(c)).
7) , Python.
8) , . : S - , rate_y - , % , n , . :
I = pV * rate
: pV- , rate - , 1/12 .
:
Pmt =V+ I
: V - .
.
V =S / n .
http://bankirsha.com/how-calculate-cost-of-credit.html
9) , . :, S - , rate_y - , % , n , . :
I = pV * rate
: pV- , rate - , 1/12 . :
Pmt =V+ I
: V - .
. , , ( , ) , . .
:
Pmt = S * rate / [ 1 - (1 / (1 + rate))n ]
http://bankirsha.com/how-calculate-cost-of-credit.html