numpy.float64 object is not iterable...but I'm NOT trying to

Question

I will provide the full code below, but the problem basically is this: I created a data structure like this: means = {ID1 : { HOUR1 : [AVERAGE_FLOW, NUMBER_OF_SAMPLES] ...} I created AVERAGE_FLOW using np.mean(). I can do this: ``` print means['716353'][0][0] #OUT : 76.6818181818 ``` but when I run the second code when I want to : ``` means[row['ID']][i][0] ``` I get: TypeError: 'numpy.float64' object is not iterable Here are the codes, the first one is where I produce the means data, and the second where I am trying to create a list: ``` shunned=[] means={} #{ #DAY: [mean, number of samples]} hour={} for i in range(24): hour[i]=[] for station in stations: means[station]=copy.deepcopy(hour) for station in d: for hour in range(24): temp=[] for day in range(1,31): if day in sb: #swtich between sa for all days and sb for business days try: #no entry = no counting in the mean, list index out of range, the station has not hourly data to begin with e = d[station][str(day)][hour][0] if not e…

Accepted Answer

It looks like you're trying to extend a list with a scalar float variable. The argument to extend must be an iterable (i.e. not a float). From your first bit of code it looks like `means[i][j][k]` returns a float,

```
print means['716353'][0][0] #OUT : 76.6818181818
```

The problem is here,

```
temp.extend(means[row['ID']][i][0])
```

If you expect that `means[i][j][k]` will always be a single value and not a list you can use append instead of extend.

```
temp.append( means[row['ID']][i][0] )
```

An example to show the difference,

```
l = [i for i in range(10)]
l.extend( 99.0 )
TypeError: 'float' object is not iterable
```

this doesn't work b/c a float is not iterable

```
l.extend( [99.0] )
print l
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 99.0]
```

this works b/c a list is iterable (even a one element list)

```
l.append( 101.0 )
print l
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 99.0, 101.0]
```

append does work with a non-iterable (e.g. a float)

numpy.float64 object is not iterable...but I'm NOT trying to

Solution

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