1 | initial version |

It's a always a good idea using the existing functionality rather than reinventing the wheel. Without the factor $q^{1/24}$ the expansion of eta function in Sage can be expanded as follows:

```
from sage.modular.etaproducts import qexp_eta
N=20
qexp_eta(ZZ[['q']], N)
```

2 | No.2 Revision |

It's a always a good idea using the existing functionality rather than reinventing the wheel.
Without the factor $q^{1/24}$ the expansion of eta function in Sage can be ~~expanded ~~computed as follows:

```
from sage.modular.etaproducts import qexp_eta
N=20
qexp_eta(ZZ[['q']], N)
```

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