Python Error TypeError: cannot concatenate 'str' and 'float' objects [duplicate]

问题

This question already has answers here:

Making a string out of a string and an integer in Python [duplicate] (6 answers)

Closed 2 years ago.

I am new with Python programming. I keep getting the below error on the 'str'. When I added the + str, it didnt work.

wkt = "POINT("+ geoPoint["lat"] +" " + geoPoint["lon"] + ")"

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TypeError: cannot concatenate 'str' and 'float' objects

Any advice on how I can fix this error?

回答1:

The simplest solution would look like this:

wkt = "POINT("+ str(geoPoint["lat"]) +" " + str(geoPoint["lon"]) + ")"

The following would be more in line with accepted Python stylistic standards:

wkt = "POINT(%f %f)" % (geoPoint["lat"], geoPoint["lon"])

This uses the simplest form of string formatting

You could do something nicer still:

wkt = "POINT({lat} {lon}".format(**geoPoint)

See the linked page for more ideas on this.

回答2:

Not able to concatenate 'str' and 'float' with '+'

Best way to concatenate string and float in python.Use format function:

wkt = "POINT({} {})".format(geoPoint["lat"], geoPoint["lon"])

Also use:

>>>wkt = "POINT(%s %s)" % (geoPoint["lat"], geoPoint["lon"])
>>>'s'+2    # use like this.It will raise type error exception
TypeError: cannot concatenate 'str' and 'float' objects
>>>'%s%s' % ('s', 2)
's2'
>>>'POINT({}{})'.format(geoPoint["lat"], geoPoint["lon"])
# It will print your value

来源：https://stackoverflow.com/questions/43971280/python-error-typeerror-cannot-concatenate-str-and-float-objects