obspy.core.stream.Stream.__iter__¶

Stream.__iter__()[source]¶

Return a robust iterator for stream.traces.

Doing this it is safe to remove traces from streams inside of for-loops using stream’s remove() method. Actually this creates a new iterator every time a trace is removed inside the for-loop.

Example

>>> from obspy import Stream
>>> st = Stream()
>>> for component in ["1", "Z", "2", "3", "Z", "N", "E", "4", "5"]:
...     channel = "EH" + component
...     tr = Trace(header={'station': 'TEST', 'channel': channel})
...     st.append(tr)  
<...Stream object at 0x...>
>>> print(st)  
9 Trace(s) in Stream:
.TEST..EH1 | 1970-01-01T00:00:00.000000Z - ... | 1.0 Hz, 0 samples
.TEST..EHZ | 1970-01-01T00:00:00.000000Z - ... | 1.0 Hz, 0 samples
.TEST..EH2 | 1970-01-01T00:00:00.000000Z - ... | 1.0 Hz, 0 samples
.TEST..EH3 | 1970-01-01T00:00:00.000000Z - ... | 1.0 Hz, 0 samples
.TEST..EHZ | 1970-01-01T00:00:00.000000Z - ... | 1.0 Hz, 0 samples
.TEST..EHN | 1970-01-01T00:00:00.000000Z - ... | 1.0 Hz, 0 samples
.TEST..EHE | 1970-01-01T00:00:00.000000Z - ... | 1.0 Hz, 0 samples
.TEST..EH4 | 1970-01-01T00:00:00.000000Z - ... | 1.0 Hz, 0 samples
.TEST..EH5 | 1970-01-01T00:00:00.000000Z - ... | 1.0 Hz, 0 samples

>>> for tr in st:
...     if tr.stats.channel[-1] not in ["Z", "N", "E"]:
...         st.remove(tr)  
<...Stream object at 0x...>
>>> print(st)  
4 Trace(s) in Stream:
.TEST..EHZ | 1970-01-01T00:00:00.000000Z - ... | 1.0 Hz, 0 samples
.TEST..EHZ | 1970-01-01T00:00:00.000000Z - ... | 1.0 Hz, 0 samples
.TEST..EHN | 1970-01-01T00:00:00.000000Z - ... | 1.0 Hz, 0 samples
.TEST..EHE | 1970-01-01T00:00:00.000000Z - ... | 1.0 Hz, 0 samples