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# Calculating the price of a bond

When the YTM is known, we can get back the bond price in the same way we used the pricing equation investigated earlier. Save the code as `bond_price.py`:

```""" Get bond price from YTM """
def bond_price(par, T, ytm, coup, freq=2):
freq = float(freq)
periods = T*freq
coupon = coup/100.*par/freq
dt = [(i+1)/freq for i in range(int(periods))]
price = sum([coupon/(1+ytm/freq)**(freq*t) for t in dt]) + \
par/(1+ytm/freq)**(freq*T)
return price```

Plugging in the same values from the earlier example, we get the following result:

```>>> from bond_price import bond_price
>>> bond_price(100, 1.5, ytm, 5.75, 2)
95.0428
```

This gives us the same original bond price discussed in the earlier example. Using the `bond_ytm` and `bond_price` functions, ...

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