1. Števila in izrazi
Naslov teme:Spremenljivka, operator, izraz in funkcija
ure: 9 in 10
Učna metoda: demonstracija, samostojno delo
Učni pripomočki: Računalnik, projektor, priročnik, vaje
Smotri: Dijak zna:
Prirediti spremenljivko
razume osnovne tipe podatkov
Uporabi osnovne operatorje
Pozna nize
Uporabi knjižnice (math)

2. Števila in izrazi Izrazi: Primer programa: print "2 + 2 je ", 2+2
99 = 100 – 1
print "(33 + 2) / = ",(33 + 2) /
(33 + 2) / = 18.5
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3. Python ima 6 osnovnih opratorjev za števila
operacija
znak
primer
potenciranje **
5 ** 2 == 25
množenje *
2 * 3 == 6
deljenje (celoštevilčno) /
14 / 3 == 4
ostanek %
14 % 3 == 2
seštevanje +
1 + 2 == 3
odštevanje -
4 - 3 == 1
Vrstni red operatorjev: oklepaji, potence, množenje/deljenje, odštevanje, seštevanje

4. print "14 / 3 = ",14 / 3
14 / 3 = 4
print "14 % 3 = ",14 % #ostanek pri celoštevilčnem deljenju
14 % 3 = 2
print "14.0 / 3.0 =",14.0 / 3.0
14.0 / 3.0 =
print "14.0 % 3.0 =",14 % 3.0
14.0 % 3.0 = 2.0
print "14.0 / 3 =",14.0 / 3
14.0 / 3 =
print "14.0 % 3 =",14.0 % 3
14.0 % 3 = 2.0
print "14 / 3.0 =",14 / 3.0
14 / 3.0 =
print "14 % 3.0 =",14 % 3.0
14 % 3.0 = 2.0

5. Ukaz
print “Prvi razred"
print "1+1 =",1+1
print "2+4 =",2+4
print "5-2 =",5-2
print
print “Tretji class"
print " =",243-23
print "12*4 =",12*4
print "12/3 =",12/3
print "13/3 =",13/3," R ",13%3
print "Junior High"
print " =",
print "(4+3)*2 =",(4+3)*2
print "4+3*2 =",4+3*2
print "3**2 =",3**2
Izpis
Prvi razred
1+1 = 2
2+4 = 6
5-2 = 3
Tretji class
= 220
12*4 = 48
12/3 = 4
13/3 = 4 R 1
Junior High
= 61.44
(4+3)*2 = 14
4+3*2 = 10
3**2 = 9

6. Vhodni podatki in spremenljivke
print “Stop!"
s = raw_input(“Kdo je? ")
print “Lahko vstopiš,", s
Ob zagonu se pojavi:
Stop!
Kdo je? Poldek #vneseš ime
Lahko vstopiš, Poldek
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7. Še nekaj primerov a = 123.4 b23 = 'Spam' ime = “Franci" b = 432
c = a + b
print "a + b is", c a + b is 555.4
print “ime ti je", ime ime ti je Franci
print "Sorted Parts, After Midnight or",b23 Sorted Parts, After Midnight or Spam
num = input("Type in a Number: ")
str = raw_input("Type in a String: ")
print "num =", num
print "num is a ",type(num)
print "num * 2 =",num*2
print "str =", str
print "str is a ",type(str)
print "str * 2 =",str*2
Type in a Number: 12.34
Type in a String: Hello
num = 12.34
num is a <type 'float'>
num * 2 = 24.68
str = Hello
str is a <type 'string'>
str * 2 = HelloHello

8. "Hello, "+"World!" == "Hello, World!"
Operacije nad nizi
Operacija
Znak
Primer
Repetition
ponavljanje *
"i"*5 == "iiiii"
Concatenation
Združevanje +
"Hello, "+"World!" == "Hello, World!"
Pravokotnik.py
#Program izracuna povrsino in obseg pravokotnika"
dolzina = input(“dolzina pravokotnika:")
visina = input(“Visina pravokotnika:")
print “Povrsina",visina*dolzina
print “Obseg",2*dolzina+2*sirina
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9. Pretvorbe stopinj temperature.py #Converts Fahrenheit to Celsius
temp = input("Farenheit temperature:")
print (temp-32.0)*5.0/9.0
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10. Primerjalni operatorji
znak
funkcija
<
less than
manj kot
<=
less than or equal to
Manj ali enako kot
>
greater than
Več kot
>=
greater than or equal to
Več ali enako kot ==
Equal
enako !=
not equal
različno
<>
another way to say not equal
Različno kot zgornje

11. Izvajajo se spodnje zamaknjene vrstice
If stavek
Dvopičje
Izvajajo se spodnje zamaknjene vrstice
#absolutna vrednost
n = input(“Stevilo? ")
if n < 0:
print “ABSOLUTNA VREDNOST OD",n,“JE",-n
else:
print " ABSOLUTNA VREDNOST OD ",n,“JE",n
Zamik kot krmilni element
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12. Modul MATH fabs(x) Return the absolute value of x. floor(x)
Return the floor of x as a float, the largest integer value less than or equal to x.
exp(x)
Return e**x.
log(x[, base])
Return the logarithm of x to the given base. If the base is not specified, return the natural logarithm of x (that is, the logarithm to base e). Changed in version 2.3: base argument added.
log10(x)
Return the base-10 logarithm of x.
pow(x, y)
Return x**y.
sqrt(x)
Return the square root of x.
Trigonometric functions:
acos(x)
Return the arc cosine of x, in radians.
asin(x)
Return the arc sine of x, in radians.

13. atan(x)
Return the arc tangent of x, in radians.
cos(x)
Return the cosine of x radians.
hypot(x, y)
Return the Euclidean norm, sqrt(x*x + y*y). This is the length of the vector from the origin to point (x, y).
sin(x)
Return the sine of x radians.
tan(x)
Return the tangent of x radians.
Angular conversion:
degrees(x)
Converts angle x from radians to degrees.
radians(x)
Converts angle x from degrees to radians.
Hyperbolic functions: : pi
The mathematical constant pi. e
The mathematical constant e.

14. Primeri uporabe import math pi=math.pi r=input(" polmer kroga")
print"obseg kroga je",2*pi*r
import math
pi=math.pi
r=input(" polmer kroga")
print"obseg kroga je",2*pi*r
print"ploscina kroga je",pi*r**2
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